Switch http to https where latter exists (#25672)

* Switch http to https where latter exists * Hopefully restore original permissions * Add URL updates after include the -L curl option * Manual corrections to select URL format strings
author: Tamara Dahlgren <35777542+tldahlgren@users.noreply.github.com> 2021-09-13 09:21:35 -0700
committer: GitHub <noreply@github.com> 2021-09-13 09:21:35 -0700
commit: bafd84e191d66b5812c1e197bf9d207479bc49e7 (patch)
tree: 55ed8f09bcc503a275a453a1368fb0498586e7f7
parent: 1e08f31e1650995b7fae8abf4c367e8c7cd34259 (diff)
download: spack-bafd84e191d66b5812c1e197bf9d207479bc49e7.tar.gz
spack-bafd84e191d66b5812c1e197bf9d207479bc49e7.tar.bz2
spack-bafd84e191d66b5812c1e197bf9d207479bc49e7.tar.xz
spack-bafd84e191d66b5812c1e197bf9d207479bc49e7.zip
339 files changed, 537 insertions, 537 deletions
diff --git a/var/spack/repos/builtin/packages/alps/package.py b/var/spack/repos/builtin/packages/alps/package.py
index b75de1c5b1..ef2686f724 100644
--- a/var/spack/repos/builtin/packages/alps/package.py
+++ b/var/spack/repos/builtin/packages/alps/package.py
@@ -13,12 +13,12 @@ class Alps(CMakePackage):
     """
 
     homepage = "https://alps.comp-phys.org"
-    url      = "http://alps.comp-phys.org/static/software/releases/alps-2.3.0-src.tar.gz"
+    url      = "https://alps.comp-phys.org/static/software/releases/alps-2.3.0-src.tar.gz"
 
     version('2.3.0', sha256='e64208d1e5acdd6f569277413c4867e1fa366cf4a224570eacbf1e9939fca2d2')
 
     # Refs for building from source and recipes
-    # http://alps.comp-phys.org/mediawiki/index.php/Building_ALPS_from_source
+    # https://alps.comp-phys.org/mediawiki/index.php/Building_ALPS_from_source
     # https://github.com/easybuilders/easybuild-easyconfigs/tree/master/easybuild/easyconfigs/a/ALPS
     # https://github.com/conda-forge/alps-feedstock/tree/master/recipe
 
diff --git a/var/spack/repos/builtin/packages/amber/package.py b/var/spack/repos/builtin/packages/amber/package.py
index 6bfc4fb6cb..95852f3007 100644
--- a/var/spack/repos/builtin/packages/amber/package.py
+++ b/var/spack/repos/builtin/packages/amber/package.py
@@ -16,7 +16,7 @@ class Amber(Package, CudaPackage):
        A manual download is required for Ambers. Spack will search your current
        directory for the download files. Alternatively, add the files to a mirror
        so that Spack can find them. For instructions on how to set up a mirror, see
-       http://spack.readthedocs.io/en/latest/mirrors.html
+       https://spack.readthedocs.io/en/latest/mirrors.html
 
        Note: Only certain versions of ambertools are compatible with amber.
        Only the latter version of ambertools for each amber version is supported.
diff --git a/var/spack/repos/builtin/packages/aocc/package.py b/var/spack/repos/builtin/packages/aocc/package.py
index 0566288884..f54b173c7c 100755
--- a/var/spack/repos/builtin/packages/aocc/package.py
+++ b/var/spack/repos/builtin/packages/aocc/package.py
@@ -24,7 +24,7 @@ class Aocc(Package):
     The AOCC Compiler Suite simplifies and accelerates development and
     tuning for x86 applications.
     Please install only if you agree to terms and conditions depicted
-    under : http://developer.amd.com/wordpress/media/files/AOCC_EULA.pdf
+    under : https://developer.amd.com/wordpress/media/files/AOCC_EULA.pdf
     Example for installation: \'spack install aocc +license-agreed\'
     '''
     family = 'compiler'
@@ -33,19 +33,19 @@ class Aocc(Package):
     maintainers = ['amd-toolchain-support']
 
     version(ver="3.1.0", sha256='1948104a430506fe5e445c0c796d6956109e7cc9fc0a1e32c9f1285cfd566d0c',
-            url='http://developer.amd.com/wordpress/media/files/aocc-compiler-3.1.0.tar')
+            url='https://developer.amd.com/wordpress/media/files/aocc-compiler-3.1.0.tar')
     version(ver="3.0.0", sha256='4ff269b1693856b9920f57e3c85ce488c8b81123ddc88682a3ff283979362227',
-            url='http://developer.amd.com/wordpress/media/files/aocc-compiler-3.0.0.tar')
+            url='https://developer.amd.com/wordpress/media/files/aocc-compiler-3.0.0.tar')
     version(ver="2.3.0", sha256='9f8a1544a5268a7fb8cd21ac4bdb3f8d1571949d1de5ca48e2d3309928fc3d15',
-            url='http://developer.amd.com/wordpress/media/files/aocc-compiler-2.3.0.tar')
+            url='https://developer.amd.com/wordpress/media/files/aocc-compiler-2.3.0.tar')
     version(ver="2.2.0", sha256='500940ce36c19297dfba3aa56dcef33b6145867a1f34890945172ac2be83b286',
-            url='http://developer.amd.com/wordpress/media/files/aocc-compiler-2.2.0.tar')
+            url='https://developer.amd.com/wordpress/media/files/aocc-compiler-2.2.0.tar')
 
     # Licensing
     license_required = True
     license_comment = '#'
     license_files = ['AOCC_EULA.pdf']
-    license_url = 'http://developer.amd.com/wordpress/media/files/AOCC_EULA.pdf'
+    license_url = 'https://developer.amd.com/wordpress/media/files/AOCC_EULA.pdf'
     install_example = "spack install aocc +license-agreed"
 
     depends_on('libxml2')
@@ -60,7 +60,7 @@ class Aocc(Package):
 
     @run_before('install')
     def abort_without_license_agreed(self):
-        license_url = 'http://developer.amd.com/wordpress/media/files/AOCC_EULA.pdf'
+        license_url = 'https://developer.amd.com/wordpress/media/files/AOCC_EULA.pdf'
         install_example = "spack install aocc +license-agreed"
         if not self.spec.variants['license-agreed'].value:
             raise InstallError("\n\n\nNOTE:\nUse +license-agreed " +
diff --git a/var/spack/repos/builtin/packages/ascent/package.py b/var/spack/repos/builtin/packages/ascent/package.py
index e3853bb42e..49affd7365 100644
--- a/var/spack/repos/builtin/packages/ascent/package.py
+++ b/var/spack/repos/builtin/packages/ascent/package.py
@@ -264,7 +264,7 @@ class Ascent(Package, CudaPackage):
         all of the options used to configure and build ascent.
 
         For more details about 'host-config' files see:
-            http://ascent.readthedocs.io/en/latest/BuildingAscent.html
+            https://ascent.readthedocs.io/en/latest/BuildingAscent.html
 
         Note:
           The `py_site_pkgs_dir` arg exists to allow a package that
diff --git a/var/spack/repos/builtin/packages/astra/package.py b/var/spack/repos/builtin/packages/astra/package.py
index 60cd133566..eadf6a20ba 100644
--- a/var/spack/repos/builtin/packages/astra/package.py
+++ b/var/spack/repos/builtin/packages/astra/package.py
@@ -14,36 +14,36 @@ class Astra(Package):
     version('2020-02-03',
             sha256='ca9ee7d3d369f9040fbd595f57f3153f712d789b66385fd2d2de88a69a774b83',
             expand=False,
-            url='http://www.desy.de/~mpyflo/Astra_for_64_Bit_Linux/Astra')
+            url='https://www.desy.de/~mpyflo/Astra_for_64_Bit_Linux/Astra')
 
     # no longer available?
     # version('2016-11-30',
     #         sha256='50738bf924724e2dd15f1d924b290ffb0f7c703e5d5ae02ffee2db554338801e',
     #         expand=False,
-    #         url='http://www.desy.de/~mpyflo/Astra_for_64_Bit_Linux/Astra')
+    #         url='https://www.desy.de/~mpyflo/Astra_for_64_Bit_Linux/Astra')
 
     variant('gui', default=False, description='Install plotting/gui tools')
 
-    resource(name='generator', url='http://www.desy.de/~mpyflo/Astra_for_64_Bit_Linux/generator',
+    resource(name='generator', url='https://www.desy.de/~mpyflo/Astra_for_64_Bit_Linux/generator',
              sha256='d31cf9fcfeb90ce0e729d8af628caf4a23f7e588a3d412d5b19241e8c684e531',
              expand=False,
              placement='generator')
-    resource(name='postpro', url='http://www.desy.de/~mpyflo/Astra_for_64_Bit_Linux/postpro',
+    resource(name='postpro', url='https://www.desy.de/~mpyflo/Astra_for_64_Bit_Linux/postpro',
              sha256='f47efb14748ce1da62bcd33c9411482bee89bcab75b28a678fc764db0c21ee8d',
              expand=False,
              when='+gui',
              placement='postpro')
-    resource(name='fieldplot', url='http://www.desy.de/~mpyflo/Astra_for_64_Bit_Linux/fieldplot',
+    resource(name='fieldplot', url='https://www.desy.de/~mpyflo/Astra_for_64_Bit_Linux/fieldplot',
              sha256='89df1da96bfd9f165fa148b84376af558e6633ab2dda837273706143ff863c96',
              expand=False,
              when='+gui',
              placement='fieldplot')
-    resource(name='lineplot', url='http://www.desy.de/~mpyflo/Astra_for_64_Bit_Linux/lineplot',
+    resource(name='lineplot', url='https://www.desy.de/~mpyflo/Astra_for_64_Bit_Linux/lineplot',
              sha256='d2d5702be9cb3d96391c6a0ca37366d580ced1f0f722fb33a6039ad7fd43b69a',
              expand=False,
              when='+gui',
              placement='lineplot')
-    resource(name='pgxwin_server', url='http://www.desy.de/~mpyflo/Astra_for_64_Bit_Linux/pgxwin_server',
+    resource(name='pgxwin_server', url='https://www.desy.de/~mpyflo/Astra_for_64_Bit_Linux/pgxwin_server',
              sha256='d2d5702be9cb3d96391c6a0ca37366d580ced1f0f722fb33a6039ad7fd43b69a',
              expand=False,
              when='+gui',
diff --git a/var/spack/repos/builtin/packages/astyle/package.py b/var/spack/repos/builtin/packages/astyle/package.py
index 48e4ba5164..b87eee4044 100644
--- a/var/spack/repos/builtin/packages/astyle/package.py
+++ b/var/spack/repos/builtin/packages/astyle/package.py
@@ -14,7 +14,7 @@ class Astyle(MakefilePackage):
     homepage = "http://astyle.sourceforge.net/"
     url = "https://sourceforge.net/projects/astyle/files/astyle/astyle%203.0.1/astyle_3.0.1_linux.tar.gz"
     # Gentoo alternative
-    # url = "http://distfiles.gentoo.org/distfiles/astyle_3.0.1_linux.tar.gz"
+    # url = "https://distfiles.gentoo.org/distfiles/astyle_3.0.1_linux.tar.gz"
 
     version('3.1',    sha256='cbcc4cf996294534bb56f025d6f199ebfde81aa4c271ccbd5ee1c1a3192745d7')
     version('3.0.1',  sha256='6c3ab029e0e4a75e2e603d449014374aa8269218fdd03a4aaa46ab743b1912fd')
diff --git a/var/spack/repos/builtin/packages/atlas/package.py b/var/spack/repos/builtin/packages/atlas/package.py
index 40a720f003..e1a152e220 100644
--- a/var/spack/repos/builtin/packages/atlas/package.py
+++ b/var/spack/repos/builtin/packages/atlas/package.py
@@ -30,7 +30,7 @@ class Atlas(Package):
     # not all packages (e.g. Trilinos@12.6.3) stopped using deprecated in 3.6.0
     # Lapack routines. Stick with 3.5.0 until this is fixed.
     resource(name='lapack',
-             url='http://www.netlib.org/lapack/lapack-3.5.0.tgz',
+             url='https://www.netlib.org/lapack/lapack-3.5.0.tgz',
              sha256='9ad8f0d3f3fb5521db49f2dd716463b8fb2b6bc9dc386a9956b8c6144f726352',
              destination='spack-resource-lapack',
              when='@3:')
diff --git a/var/spack/repos/builtin/packages/atompaw/package.py b/var/spack/repos/builtin/packages/atompaw/package.py
index 5590587392..543fb0d3a3 100644
--- a/var/spack/repos/builtin/packages/atompaw/package.py
+++ b/var/spack/repos/builtin/packages/atompaw/package.py
@@ -16,7 +16,7 @@ class Atompaw(Package):
     User's guide: ~/doc/atompaw-usersguide.pdf
     """
     homepage = "https://users.wfu.edu/natalie/papers/pwpaw/man.html"
-    url = "http://users.wfu.edu/natalie/papers/pwpaw/atompaw-4.0.0.13.tar.gz"
+    url = "https://users.wfu.edu/natalie/papers/pwpaw/atompaw-4.0.0.13.tar.gz"
 
     version('4.1.1.0', sha256='b1ee2b53720066655d98523ef337e54850cb1e68b3a2da04ff5a1576d3893891')
     version('4.0.0.13', sha256='cbd73f11f3e9cc3ff2e5f3ec87498aeaf439555903d0b95a72f3b0a021902020')
diff --git a/var/spack/repos/builtin/packages/atop/package.py b/var/spack/repos/builtin/packages/atop/package.py
index fb22f272c6..0e1f465546 100644
--- a/var/spack/repos/builtin/packages/atop/package.py
+++ b/var/spack/repos/builtin/packages/atop/package.py
@@ -9,7 +9,7 @@ from spack import *
 class Atop(Package):
     """Atop is an ASCII full-screen performance monitor for Linux"""
     homepage = "https://www.atoptool.nl/index.php"
-    url      = "http://www.atoptool.nl/download/atop-2.2-3.tar.gz"
+    url      = "https://www.atoptool.nl/download/atop-2.2-3.tar.gz"
 
     version('2.5.0', sha256='4b911057ce50463b6e8b3016c5963d48535c0cddeebc6eda817e292b22f93f33')
     version('2.4.0', sha256='be1c010a77086b7d98376fce96514afcd73c3f20a8d1fe01520899ff69a73d69')
diff --git a/var/spack/repos/builtin/packages/attr/package.py b/var/spack/repos/builtin/packages/attr/package.py
index 34c442891d..8dc5dbe034 100644
--- a/var/spack/repos/builtin/packages/attr/package.py
+++ b/var/spack/repos/builtin/packages/attr/package.py
@@ -28,7 +28,7 @@ class Attr(AutotoolsPackage):
         args.append('--disable-static')
         return args
 
-    # Ref. http://www.linuxfromscratch.org/blfs/view/7.5/postlfs/attr.html
+    # Ref. https://www.linuxfromscratch.org/blfs/view/7.5/postlfs/attr.html
     def install(self, spec, prefix):
         if self.version >= Version('2.4.48'):
             make('install')
diff --git a/var/spack/repos/builtin/packages/augustus/package.py b/var/spack/repos/builtin/packages/augustus/package.py
index 2a16602773..aaac47b92c 100644
--- a/var/spack/repos/builtin/packages/augustus/package.py
+++ b/var/spack/repos/builtin/packages/augustus/package.py
@@ -21,9 +21,9 @@ class Augustus(MakefilePackage):
     version('3.3.1-tag1', sha256='011379606f381ee21b9716f83e8a1a57b2aaa01aefeebd2748104efa08c47cab',
             url='https://github.com/Gaius-Augustus/Augustus/archive/v3.3.1-tag1.tar.gz')
     version('3.3',   sha256='b5eb811a4c33a2cc3bbd16355e19d530eeac6d1ac923e59f48d7a79f396234ee',
-            url='http://bioinf.uni-greifswald.de/augustus/binaries/old/augustus-3.3.tar.gz')
+            url='https://bioinf.uni-greifswald.de/augustus/binaries/old/augustus-3.3.tar.gz')
     version('3.2.3', sha256='a1af128aefd228dea0c46d6f5234910fdf068a2b9133175ca8da3af639cb4514',
-            url='http://bioinf.uni-greifswald.de/augustus/binaries/old/augustus-3.2.3.tar.gz')
+            url='https://bioinf.uni-greifswald.de/augustus/binaries/old/augustus-3.2.3.tar.gz')
 
     depends_on('perl', type=('build', 'run'))
     depends_on('python', when='@3.3.1:', type=('build', 'run'))
diff --git a/var/spack/repos/builtin/packages/autofact/package.py b/var/spack/repos/builtin/packages/autofact/package.py
index 099506a988..b6947ed0f3 100644
--- a/var/spack/repos/builtin/packages/autofact/package.py
+++ b/var/spack/repos/builtin/packages/autofact/package.py
@@ -12,7 +12,7 @@ class Autofact(Package):
     """An Automatic Functional Annotation and Classification Tool"""
 
     homepage = "https://megasun.bch.umontreal.ca/Software/AutoFACT.htm"
-    url      = "http://megasun.bch.umontreal.ca/Software/AutoFACT_v3_4.tar"
+    url      = "https://megasun.bch.umontreal.ca/Software/AutoFACT_v3_4.tar"
 
     version('3_4', sha256='1465d263b19adb42f01f6e636ac40ef1c2e3dbd63461f977b89da9493fe9c6f4')
 
diff --git a/var/spack/repos/builtin/packages/bamutil/package.py b/var/spack/repos/builtin/packages/bamutil/package.py
index 625c44184b..6bdbcde0b7 100644
--- a/var/spack/repos/builtin/packages/bamutil/package.py
+++ b/var/spack/repos/builtin/packages/bamutil/package.py
@@ -13,7 +13,7 @@ class Bamutil(MakefilePackage):
     """
 
     homepage = "https://genome.sph.umich.edu/wiki/BamUtil"
-    url      = "http://genome.sph.umich.edu/w/images/7/70/BamUtilLibStatGen.1.0.13.tgz"
+    url      = "https://genome.sph.umich.edu/w/images/7/70/BamUtilLibStatGen.1.0.13.tgz"
 
     version('1.0.13', sha256='16c1d01c37d1f98b98c144f3dd0fda6068c1902f06bd0989f36ce425eb0c592b')
 
diff --git a/var/spack/repos/builtin/packages/beagle/package.py b/var/spack/repos/builtin/packages/beagle/package.py
index ad72d8a06d..76b4de1867 100644
--- a/var/spack/repos/builtin/packages/beagle/package.py
+++ b/var/spack/repos/builtin/packages/beagle/package.py
@@ -15,7 +15,7 @@ class Beagle(Package):
     homepage = "https://faculty.washington.edu/browning/beagle/beagle.html"
 
     version('5.1', sha256='994f926a4ec0eac665631f37c4a961d3f75c966c71841079275364013c90996c',
-            expand=False, url='http://faculty.washington.edu/browning/beagle/beagle.25Nov19.28d.jar')
+            expand=False, url='https://faculty.washington.edu/browning/beagle/beagle.25Nov19.28d.jar')
     version('5.0', sha256='8390fe18b53786b676b67dddae6d1c086d6225e518f6a82047f4138196b48621',
             expand=False, url='https://faculty.washington.edu/browning/beagle/beagle.12Jul19.0df.jar')
     version('4.1', sha256='6c94610b278fc108c3e80b1134226911be1fc92b7d378ba648ac3eb97c5a3207',
diff --git a/var/spack/repos/builtin/packages/berkeley-db/package.py b/var/spack/repos/builtin/packages/berkeley-db/package.py
index d2c79fc8db..0e5fbdbbf1 100644
--- a/var/spack/repos/builtin/packages/berkeley-db/package.py
+++ b/var/spack/repos/builtin/packages/berkeley-db/package.py
@@ -9,7 +9,7 @@ class BerkeleyDb(AutotoolsPackage):
 
     homepage = "https://www.oracle.com/database/technologies/related/berkeleydb.html"
     # URL must remain http:// so Spack can bootstrap curl
-    url      = "http://download.oracle.com/berkeley-db/db-18.1.40.tar.gz"
+    url      = "https://download.oracle.com/berkeley-db/db-18.1.40.tar.gz"
 
     version("18.1.40", sha256="0cecb2ef0c67b166de93732769abdeba0555086d51de1090df325e18ee8da9c8")
     version('18.1.32', sha256='fa1fe7de9ba91ad472c25d026f931802597c29f28ae951960685cde487c8d654', deprecated=True)
diff --git a/var/spack/repos/builtin/packages/blogbench/package.py b/var/spack/repos/builtin/packages/blogbench/package.py
index d66bf8b77c..e6f371c0bd 100644
--- a/var/spack/repos/builtin/packages/blogbench/package.py
+++ b/var/spack/repos/builtin/packages/blogbench/package.py
@@ -10,7 +10,7 @@ class Blogbench(AutotoolsPackage):
     """A filesystem benchmark tool that simulates a realistic load."""
 
     homepage = "https://openbenchmarking.org/test/pts/blogbench"
-    url      = "http://download.pureftpd.org/pub/blogbench/blogbench-1.1.tar.gz"
+    url      = "https://download.pureftpd.org/pub/blogbench/blogbench-1.1.tar.gz"
 
     version('1.1', sha256='8cded059bfdbccb7be35bb6a2272ecfdbe3fbea43d53c92ba5572ac24f26c4df')
     version('1.0', sha256='dc29261a19064a8fb64d39b27607f19d3b33ce3795908e717404167687ef33be')
diff --git a/var/spack/repos/builtin/packages/bmake/package.py b/var/spack/repos/builtin/packages/bmake/package.py
index 566516207b..67d552cb27 100644
--- a/var/spack/repos/builtin/packages/bmake/package.py
+++ b/var/spack/repos/builtin/packages/bmake/package.py
@@ -10,7 +10,7 @@ class Bmake(Package):
     """Portable version of NetBSD make(1)."""
 
     homepage = "https://www.crufty.net/help/sjg/bmake.htm"
-    url      = "http://www.crufty.net/ftp/pub/sjg/bmake-20180512.tar.gz"
+    url      = "https://www.crufty.net/ftp/pub/sjg/bmake-20180512.tar.gz"
 
     version('20200710', sha256='6538fc4319ef79d178dca76d3b869f7aa93a9bb7b510df08a7d872c01a56b76c')
     version('20180512', sha256='ac3cd262065fcc20c1dec7c95f06306c8138b3e17025b949343a06a8980a5508')
diff --git a/var/spack/repos/builtin/packages/boost/package.py b/var/spack/repos/builtin/packages/boost/package.py
index 9f25a195ea..bfd24c365e 100644
--- a/var/spack/repos/builtin/packages/boost/package.py
+++ b/var/spack/repos/builtin/packages/boost/package.py
@@ -21,7 +21,7 @@ class Boost(Package):
     homepage = "https://www.boost.org"
     url      = "http://downloads.sourceforge.net/project/boost/boost/1.55.0/boost_1_55_0.tar.bz2"
     git      = "https://github.com/boostorg/boost.git"
-    list_url = "http://sourceforge.net/projects/boost/files/boost/"
+    list_url = "https://sourceforge.net/projects/boost/files/boost/"
     list_depth = 1
     maintainers = ['hainest']
 
@@ -248,7 +248,7 @@ class Boost(Package):
     patch('bootstrap-path.patch', when='@1.39.0: platform=cray')
 
     # Patch fix for warnings from commits 2d37749, af1dc84, c705bab, and
-    # 0134441 on http://github.com/boostorg/system.
+    # 0134441 on https://github.com/boostorg/system.
     patch('system-non-virtual-dtor-include.patch', when='@1.69.0',
           level=2)
     patch('system-non-virtual-dtor-test.patch', when='@1.69.0',
@@ -474,7 +474,7 @@ class Boost(Package):
 
         # clang is not officially supported for pre-compiled headers
         # and at least in clang 3.9 still fails to build
-        #   http://www.boost.org/build/doc/html/bbv2/reference/precompiled_headers.html
+        #   https://www.boost.org/build/doc/html/bbv2/reference/precompiled_headers.html
         #   https://svn.boost.org/trac/boost/ticket/12496
         if (spec.satisfies('%apple-clang') or
                 spec.satisfies('%clang') or
diff --git a/var/spack/repos/builtin/packages/braker/package.py b/var/spack/repos/builtin/packages/braker/package.py
index b079393387..4f3fe2881c 100644
--- a/var/spack/repos/builtin/packages/braker/package.py
+++ b/var/spack/repos/builtin/packages/braker/package.py
@@ -17,7 +17,7 @@ class Braker(Package):
     version('2.1.6', sha256='eef3c4037364472988a010322cbd79b5171158f9c016f4383809adade4866c06')
     version('2.1.4', sha256='d48af5649cc879343046f9ddf180fe2c709b5810e0b78cf314bf298514d31d52')
     version('1.11', sha256='cb2d9abe1720ed58753d362eee4af3791007efc617754804882d31f9fe2eab00',
-            url='http://bioinf.uni-greifswald.de/augustus/binaries/old/BRAKER1_v1.11.tar.gz')
+            url='https://bioinf.uni-greifswald.de/augustus/binaries/old/BRAKER1_v1.11.tar.gz')
 
     depends_on('perl', type=('build', 'run'))
     depends_on('perl-scalar-util-numeric', type=('build', 'run'))
diff --git a/var/spack/repos/builtin/packages/bref3/package.py b/var/spack/repos/builtin/packages/bref3/package.py
index 59ad599636..7a2734a031 100644
--- a/var/spack/repos/builtin/packages/bref3/package.py
+++ b/var/spack/repos/builtin/packages/bref3/package.py
@@ -14,7 +14,7 @@ class Bref3(Package):
     homepage = "https://faculty.washington.edu/browning/beagle/beagle.html"
 
     version('2019-11-25', sha256='969c0881050c4a48d19be9ea64bf49fa68c1403b69f9f739bbfd865dda639b2d',
-            expand=False, url='http://faculty.washington.edu/browning/beagle/bref3.25Nov19.28d.jar')
+            expand=False, url='https://faculty.washington.edu/browning/beagle/bref3.25Nov19.28d.jar')
     version('2019-07-12', sha256='8a9c3b6c38e36ef4c05a61108f083005fd985026c67d75a8173088f88816a202',
             expand=False, url='https://faculty.washington.edu/browning/beagle/bref3.12Jul19.0df.jar')
     version('2018-01-27', sha256='4d32f0b6d536c88d5332d961309466c8c3dd9572907a3755450d26d7ba841083',
diff --git a/var/spack/repos/builtin/packages/cachefilesd/package.py b/var/spack/repos/builtin/packages/cachefilesd/package.py
index 19323324c0..3b0a2115c3 100644
--- a/var/spack/repos/builtin/packages/cachefilesd/package.py
+++ b/var/spack/repos/builtin/packages/cachefilesd/package.py
@@ -12,7 +12,7 @@ class Cachefilesd(MakefilePackage):
     persistent caching to the local disk."""
 
     homepage = "https://people.redhat.com/~dhowells/fscache"
-    url      = "http://people.redhat.com/~dhowells/fscache/cachefilesd-0.10.tar.bz2"
+    url      = "https://people.redhat.com/~dhowells/fscache/cachefilesd-0.10.tar.bz2"
 
     version('0.10.10', sha256='0d0309851efabd02b7c849f73535b8ad3f831570e83e4f65e42354da18e11a02')
     version('0.10.9',  sha256='c897ec6704615f26de3ddc20ff30a191ce995cb8973d2cde88b4b28c1a1e6bca')
diff --git a/var/spack/repos/builtin/packages/catalyst/package.py b/var/spack/repos/builtin/packages/catalyst/package.py
index 9c9602d18e..7536f7d95e 100644
--- a/var/spack/repos/builtin/packages/catalyst/package.py
+++ b/var/spack/repos/builtin/packages/catalyst/package.py
@@ -18,9 +18,9 @@ class Catalyst(CMakePackage):
     simulation and analysis and/or visualization tasks."""
 
     homepage = 'http://www.paraview.org'
-    url      = "http://www.paraview.org/files/v5.5/ParaView-v5.5.2.tar.gz"
-    _urlfmt_gz = 'http://www.paraview.org/files/v{0}/ParaView-v{1}{2}.tar.gz'
-    _urlfmt_xz = 'http://www.paraview.org/files/v{0}/ParaView-v{1}{2}.tar.xz'
+    url      = "https://www.paraview.org/files/v5.5/ParaView-v5.5.2.tar.gz"
+    _urlfmt_gz = 'https://www.paraview.org/files/v{0}/ParaView-v{1}{2}.tar.gz'
+    _urlfmt_xz = 'https://www.paraview.org/files/v{0}/ParaView-v{1}{2}.tar.xz'
 
     maintainers = ['chuckatkins', 'danlipsa']
 
diff --git a/var/spack/repos/builtin/packages/cblas/package.py b/var/spack/repos/builtin/packages/cblas/package.py
index f70a38fcf4..d76b414a67 100644
--- a/var/spack/repos/builtin/packages/cblas/package.py
+++ b/var/spack/repos/builtin/packages/cblas/package.py
@@ -15,7 +15,7 @@ class Cblas(Package):
 
     # tarball has no version, but on the date below, this MD5 was correct.
     version('2015-06-06', sha256='0f6354fd67fabd909baf57ced2ef84e962db58fae126e4f41b21dd4fec60a2a3',
-            url='http://www.netlib.org/blas/blast-forum/cblas.tgz')
+            url='https://www.netlib.org/blas/blast-forum/cblas.tgz')
 
     depends_on('blas')
     parallel = False
diff --git a/var/spack/repos/builtin/packages/cdd/package.py b/var/spack/repos/builtin/packages/cdd/package.py
index 1c6f9f2a1b..15f3bd6340 100644
--- a/var/spack/repos/builtin/packages/cdd/package.py
+++ b/var/spack/repos/builtin/packages/cdd/package.py
@@ -14,7 +14,7 @@ class Cdd(Package):
     a general convex polyhedron given by a system of linear
     inequalities"""
     homepage = "https://www.inf.ethz.ch/personal/fukudak/cdd_home/cdd.html"
-    url      = "http://www.cs.mcgill.ca/~fukuda/download/cdd/cdd-061a.tar.gz"
+    url      = "https://www.cs.mcgill.ca/~fukuda/download/cdd/cdd-061a.tar.gz"
 
     version('0.61a', sha256='637a1909bbd8aa4d32667da08f9e9ac687bf7d3ef1b8af5bd227e91a3cd4019b')
 
diff --git a/var/spack/repos/builtin/packages/cgal/package.py b/var/spack/repos/builtin/packages/cgal/package.py
index 4d579221b0..24cc1d1b4e 100644
--- a/var/spack/repos/builtin/packages/cgal/package.py
+++ b/var/spack/repos/builtin/packages/cgal/package.py
@@ -35,11 +35,11 @@ class Cgal(CMakePackage):
             description='Install in header only mode')
 
     # ---- See "7 CGAL Libraries" at:
-    # http://doc.cgal.org/latest/Manual/installation.html
+    # https://doc.cgal.org/latest/Manual/installation.html
 
     # The CORE library provides exact arithmetic for geometric computations.
-    # See: http://cs.nyu.edu/exact/core_pages/
-    #      http://cs.nyu.edu/exact/core_pages/svn-core.html
+    # See: https://cs.nyu.edu/exact/core_pages/
+    #      https://cs.nyu.edu/exact/core_pages/svn-core.html
     variant('core', default=False,
             description='Build the CORE library for algebraic numbers')
     variant('imageio', default=False,
@@ -91,7 +91,7 @@ class Cgal(CMakePackage):
 
     def cmake_args(self):
         # Installation instructions:
-        # http://doc.cgal.org/latest/Manual/installation.html
+        # https://doc.cgal.org/latest/Manual/installation.html
         spec = self.spec
         variant_bool = lambda feature: str(feature in spec)
         cmake_args = []
diff --git a/var/spack/repos/builtin/packages/chombo/package.py b/var/spack/repos/builtin/packages/chombo/package.py
index af4a2ab68b..ff7e908cfb 100644
--- a/var/spack/repos/builtin/packages/chombo/package.py
+++ b/var/spack/repos/builtin/packages/chombo/package.py
@@ -11,7 +11,7 @@ class Chombo(MakefilePackage):
        logically rectangular (i.e. Cartesian) grids."""
 
     homepage = "https://commons.lbl.gov/display/chombo"
-    git      = "http://bitbucket.org/drhansj/chombo-xsdk.git"
+    git      = "https://bitbucket.org/drhansj/chombo-xsdk.git"
 
     tags = ['ecp', 'ecp-apps']
 
diff --git a/var/spack/repos/builtin/packages/clapack/package.py b/var/spack/repos/builtin/packages/clapack/package.py
index d6a3948902..9bd6d6b225 100644
--- a/var/spack/repos/builtin/packages/clapack/package.py
+++ b/var/spack/repos/builtin/packages/clapack/package.py
@@ -16,7 +16,7 @@ class Clapack(MakefilePackage):
     compiler."""
 
     homepage = "https://www.netlib.org/clapack/"
-    url      = "http://www.netlib.org/clapack/clapack.tgz"
+    url      = "https://www.netlib.org/clapack/clapack.tgz"
 
     version('3.2.1', sha256='6dc4c382164beec8aaed8fd2acc36ad24232c406eda6db462bd4c41d5e455fac')
 
diff --git a/var/spack/repos/builtin/packages/clhep/package.py b/var/spack/repos/builtin/packages/clhep/package.py
index bdf7dc6657..65b04a35c7 100644
--- a/var/spack/repos/builtin/packages/clhep/package.py
+++ b/var/spack/repos/builtin/packages/clhep/package.py
@@ -10,7 +10,7 @@ from spack import *
 class Clhep(CMakePackage):
     """CLHEP is a C++ Class Library for High Energy Physics. """
     homepage = "https://proj-clhep.web.cern.ch/proj-clhep/"
-    url      = "http://proj-clhep.web.cern.ch/proj-clhep/dist1/clhep-2.4.1.3.tgz"
+    url      = "https://proj-clhep.web.cern.ch/proj-clhep/dist1/clhep-2.4.1.3.tgz"
     list_url = "https://proj-clhep.web.cern.ch/proj-clhep/"
     list_depth = 1
 
diff --git a/var/spack/repos/builtin/packages/cloverleaf/package.py b/var/spack/repos/builtin/packages/cloverleaf/package.py
index a39df60783..6b5d3fd042 100644
--- a/var/spack/repos/builtin/packages/cloverleaf/package.py
+++ b/var/spack/repos/builtin/packages/cloverleaf/package.py
@@ -11,7 +11,7 @@ class Cloverleaf(MakefilePackage):
     """
 
     homepage = "https://uk-mac.github.io/CloverLeaf"
-    url      = "http://downloads.mantevo.org/releaseTarballs/miniapps/CloverLeaf/CloverLeaf-1.1.tar.gz"
+    url      = "https://downloads.mantevo.org/releaseTarballs/miniapps/CloverLeaf/CloverLeaf-1.1.tar.gz"
     git      = "https://github.com/UK-MAC/CloverLeaf.git"
 
     tags = ['proxy-app']
diff --git a/var/spack/repos/builtin/packages/cloverleaf3d/package.py b/var/spack/repos/builtin/packages/cloverleaf3d/package.py
index 27b5fa9c47..86aadd8955 100644
--- a/var/spack/repos/builtin/packages/cloverleaf3d/package.py
+++ b/var/spack/repos/builtin/packages/cloverleaf3d/package.py
@@ -12,7 +12,7 @@ class Cloverleaf3d(MakefilePackage):
     """
 
     homepage = "https://uk-mac.github.io/CloverLeaf3D/"
-    url = "http://downloads.mantevo.org/releaseTarballs/miniapps/CloverLeaf3D/CloverLeaf3D-1.0.tar.gz"
+    url = "https://downloads.mantevo.org/releaseTarballs/miniapps/CloverLeaf3D/CloverLeaf3D-1.0.tar.gz"
 
     tags = ["proxy-app"]
 
diff --git a/var/spack/repos/builtin/packages/coinhsl/package.py b/var/spack/repos/builtin/packages/coinhsl/package.py
index 4c2a7ee942..9ea6b73581 100644
--- a/var/spack/repos/builtin/packages/coinhsl/package.py
+++ b/var/spack/repos/builtin/packages/coinhsl/package.py
@@ -19,7 +19,7 @@ class Coinhsl(AutotoolsPackage):
     of CoinHSL yourself. Spack will search your current directory for
     the download file. Alternatively, add this file to a mirror so
     that Spack can find it. For instructions on how to set up a
-    mirror, see http://spack.readthedocs.io/en/latest/mirrors.html"""
+    mirror, see https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     # NOTE(oxberry1@llnl.gov): an HTTPS version of the URL below does not
     # exist
@@ -33,13 +33,13 @@ class Coinhsl(AutotoolsPackage):
     # Version 2019.05.21 is a full-featured "release candidate"
     # version available via an "academic license" that can be used for
     # personal teaching and research purposes only. For a full list of
-    # conditions, see http://www.hsl.rl.ac.uk/academic.html.
+    # conditions, see https://www.hsl.rl.ac.uk/academic.html.
     version('2019.05.21', sha256='95ce1160f0b013151a3e25d40337775c760a8f3a79d801a1d190598bf4e4c0c3')
 
     # Version 2015.06.23 is a full-featured "stable"
     # version available via an "academic license" that can be used for
     # personal teaching and research purposes only. For a full list of
-    # conditions, see http://www.hsl.rl.ac.uk/academic.html.
+    # conditions, see https://www.hsl.rl.ac.uk/academic.html.
     version('2015.06.23', sha256='3e955a2072f669b8f357ae746531b37aea921552e415dc219a5dd13577575fb3',
             preferred=True)
 
diff --git a/var/spack/repos/builtin/packages/colm/package.py b/var/spack/repos/builtin/packages/colm/package.py
index 536b88720a..aed1b2d304 100644
--- a/var/spack/repos/builtin/packages/colm/package.py
+++ b/var/spack/repos/builtin/packages/colm/package.py
@@ -14,6 +14,6 @@ class Colm(AutotoolsPackage):
     """
 
     homepage = "https://www.colm.net/open-source/colm"
-    url      = "http://www.colm.net/files/colm/colm-0.12.0.tar.gz"
+    url      = "https://www.colm.net/files/colm/colm-0.12.0.tar.gz"
 
     version('0.12.0', sha256='7b545d74bd139f5c622975d243c575310af1e4985059a1427b6fdbb1fb8d6e4d')
diff --git a/var/spack/repos/builtin/packages/commons-logging/package.py b/var/spack/repos/builtin/packages/commons-logging/package.py
index 4416e4fea1..094ab369fb 100644
--- a/var/spack/repos/builtin/packages/commons-logging/package.py
+++ b/var/spack/repos/builtin/packages/commons-logging/package.py
@@ -19,7 +19,7 @@ class CommonsLogging(Package):
     adapters for others is a reasonably simple task."""
 
     homepage = "https://commons.apache.org/proper/commons-logging/"
-    url      = "http://archive.apache.org/dist/commons/logging/binaries/commons-logging-1.2-bin.tar.gz"
+    url      = "https://archive.apache.org/dist/commons/logging/binaries/commons-logging-1.2-bin.tar.gz"
 
     version('1.2',   sha256='3f758805c7290d9c6d22d1451587c9f7232744aef4c984e88aa683cdea0587bd')
     version('1.1.3', sha256='9e7093c93529792563b5c19ab5cccb73ef4ca7d82b886bdec6d0af182ba9908a')
diff --git a/var/spack/repos/builtin/packages/converge/package.py b/var/spack/repos/builtin/packages/converge/package.py
index 9f20667335..27bab2db62 100644
--- a/var/spack/repos/builtin/packages/converge/package.py
+++ b/var/spack/repos/builtin/packages/converge/package.py
@@ -82,7 +82,7 @@ class Converge(Package):
     license_comment = '#'
     license_files = ['license/license.lic']
     license_vars = ['RLM_LICENSE']
-    license_url = 'http://www.reprisesoftware.com/RLM_License_Administration.pdf'
+    license_url = 'https://www.reprisesoftware.com/RLM_License_Administration.pdf'
 
     def url_for_version(self, version):
         url = "https://download.convergecfd.com/download/CONVERGE_{0}/Full_Solver_Packages/converge_install_{1}.tar.gz"
diff --git a/var/spack/repos/builtin/packages/couchdb/package.py b/var/spack/repos/builtin/packages/couchdb/package.py
index 0c177ecb86..4498247feb 100644
--- a/var/spack/repos/builtin/packages/couchdb/package.py
+++ b/var/spack/repos/builtin/packages/couchdb/package.py
@@ -12,7 +12,7 @@ class Couchdb(AutotoolsPackage):
     for reading and updating (add, edit, delete) database documents."""
 
     homepage = "https://couchdb.apache.org/"
-    url      = "http://archive.apache.org/dist/couchdb/source/3.1.0/apache-couchdb-3.1.0.tar.gz"
+    url      = "https://archive.apache.org/dist/couchdb/source/3.1.0/apache-couchdb-3.1.0.tar.gz"
 
     version('3.1.0', sha256='4867c796a1ff6f0794b7bd3863089ea6397bd5c47544f9b97db8cdacff90f8ed')
     version('3.0.1', sha256='08d61d5c779957d074d5097f28a2dfc9eb518af3c479d5318135ff31212cc522')
diff --git a/var/spack/repos/builtin/packages/cppunit/package.py b/var/spack/repos/builtin/packages/cppunit/package.py
index 03f29c0f10..b650e0efa4 100644
--- a/var/spack/repos/builtin/packages/cppunit/package.py
+++ b/var/spack/repos/builtin/packages/cppunit/package.py
@@ -10,7 +10,7 @@ class Cppunit(AutotoolsPackage):
     """Obsolete Unit testing framework for C++"""
 
     homepage = "https://wiki.freedesktop.org/www/Software/cppunit/"
-    url = "http://dev-www.libreoffice.org/src/cppunit-1.13.2.tar.gz"
+    url = "https://dev-www.libreoffice.org/src/cppunit-1.13.2.tar.gz"
 
     version('1.14.0', sha256='3d569869d27b48860210c758c4f313082103a5e58219a7669b52bfd29d674780')
     version('1.13.2', sha256='3f47d246e3346f2ba4d7c9e882db3ad9ebd3fcbd2e8b732f946e0e3eeb9f429f')
diff --git a/var/spack/repos/builtin/packages/cryptopp/package.py b/var/spack/repos/builtin/packages/cryptopp/package.py
index 769593e942..d485224e84 100644
--- a/var/spack/repos/builtin/packages/cryptopp/package.py
+++ b/var/spack/repos/builtin/packages/cryptopp/package.py
@@ -14,7 +14,7 @@ class Cryptopp(MakefilePackage):
     algorithms (MD5, Panama)."""
 
     homepage = "https://www.cryptopp.com"
-    url      = "http://www.cryptopp.com/cryptopp700.zip"
+    url      = "https://www.cryptopp.com/cryptopp700.zip"
 
     version('7.0.0', sha256='a4bc939910edd3d29fb819a6fc0dfdc293f686fa62326f61c56d72d0a366ceb0')
     version('6.1.0', sha256='21289d2511101a9350c87c8eb1f4982d4a266e8037b19dab79a32cc13ea108c7')
diff --git a/var/spack/repos/builtin/packages/csdp/package.py b/var/spack/repos/builtin/packages/csdp/package.py
index bd9d7b097e..846e4f5d42 100644
--- a/var/spack/repos/builtin/packages/csdp/package.py
+++ b/var/spack/repos/builtin/packages/csdp/package.py
@@ -12,7 +12,7 @@ class Csdp(MakefilePackage):
        Vanderbei, and Wolkowicz"""
 
     homepage = "https://projects.coin-or.org/Csdp"
-    url      = "http://www.coin-or.org/download/source/Csdp/Csdp-6.1.1.tgz"
+    url      = "https://www.coin-or.org/download/source/Csdp/Csdp-6.1.1.tgz"
 
     version('6.1.1', sha256='0558a46ac534e846bf866b76a9a44e8a854d84558efa50988ffc092f99a138b9')
 
diff --git a/var/spack/repos/builtin/packages/cube-blade/package.py b/var/spack/repos/builtin/packages/cube-blade/package.py
index 79a9e3e217..4fa651c9ec 100644
--- a/var/spack/repos/builtin/packages/cube-blade/package.py
+++ b/var/spack/repos/builtin/packages/cube-blade/package.py
@@ -10,7 +10,7 @@ class CubeBlade(AutotoolsPackage):
     """Simple OTF2 trace explorer"""
 
     homepage = "https://www.scalasca.org/software/cube-4.x/download.html"
-    url      = "http://apps.fz-juelich.de/scalasca/releases/cube/4.5/dist/blade-0.2.tar.gz"
+    url      = "https://apps.fz-juelich.de/scalasca/releases/cube/4.5/dist/blade-0.2.tar.gz"
 
     version('0.2', sha256='ab3c5bbca79e2ec599166e75b3c96a8f6a18b3064414fc39e56f78aaae9c165c')
 
diff --git a/var/spack/repos/builtin/packages/cube/package.py b/var/spack/repos/builtin/packages/cube/package.py
index 1d1107d055..280e0844b0 100644
--- a/var/spack/repos/builtin/packages/cube/package.py
+++ b/var/spack/repos/builtin/packages/cube/package.py
@@ -15,7 +15,7 @@ class Cube(AutotoolsPackage):
     """
 
     homepage = "https://www.scalasca.org/software/cube-4.x/download.html"
-    url      = "http://apps.fz-juelich.de/scalasca/releases/cube/4.4/dist/cubegui-4.4.2.tar.gz"
+    url      = "https://apps.fz-juelich.de/scalasca/releases/cube/4.4/dist/cubegui-4.4.2.tar.gz"
 
     version('4.6',   sha256='1871c6736121d94a22314cb5daa8f3cbb978b58bfe54f677c4c9c9693757d0c5')
     version('4.5',   sha256='ffe84108adce0adf06dca80820d941b1a60a5580a8bacc8f7c1b6989c8ab1bfa')
diff --git a/var/spack/repos/builtin/packages/cubelib/package.py b/var/spack/repos/builtin/packages/cubelib/package.py
index c124e82b40..e7d4fd4327 100644
--- a/var/spack/repos/builtin/packages/cubelib/package.py
+++ b/var/spack/repos/builtin/packages/cubelib/package.py
@@ -10,7 +10,7 @@ class Cubelib(AutotoolsPackage):
     """Component of CubeBundle: General purpose C++ library and tools """
 
     homepage = "https://www.scalasca.org/software/cube-4.x/download.html"
-    url = "http://apps.fz-juelich.de/scalasca/releases/cube/4.4/dist/cubelib-4.4.tar.gz"
+    url = "https://apps.fz-juelich.de/scalasca/releases/cube/4.4/dist/cubelib-4.4.tar.gz"
 
     version('4.6', sha256='36eaffa7688db8b9304c9e48ca5dc4edc2cb66538aaf48657b9b5ccd7979385b')
     version('4.5', sha256='98f66837b4a834b1aacbcd4480a242d7a8c4a1b8dd44e02e836b8c7a4f0ffd98')
diff --git a/var/spack/repos/builtin/packages/cubew/package.py b/var/spack/repos/builtin/packages/cubew/package.py
index 32972886a8..5f0f8b6b57 100644
--- a/var/spack/repos/builtin/packages/cubew/package.py
+++ b/var/spack/repos/builtin/packages/cubew/package.py
@@ -10,7 +10,7 @@ class Cubew(AutotoolsPackage):
     """Component of CubeBundle: High performance C Writer library """
 
     homepage = "https://www.scalasca.org/software/cube-4.x/download.html"
-    url = "http://apps.fz-juelich.de/scalasca/releases/cube/4.4/dist/cubew-4.4.tar.gz"
+    url = "https://apps.fz-juelich.de/scalasca/releases/cube/4.4/dist/cubew-4.4.tar.gz"
 
     version('4.6', sha256='99fe58ce7ab13061ebfbc360aedaecc28099a30636c5269a42c0cbaf57149aa8')
     version('4.5', sha256='16bd8fd864197a74ca65f7325761ad75d73d555072326e95e1338cff39f28a5c')
diff --git a/var/spack/repos/builtin/packages/cuda/package.py b/var/spack/repos/builtin/packages/cuda/package.py
index 27271154ad..a5b1955fbf 100644
--- a/var/spack/repos/builtin/packages/cuda/package.py
+++ b/var/spack/repos/builtin/packages/cuda/package.py
@@ -84,9 +84,9 @@ _versions = {
     '8.0.44': {
         'Linux-x86_64': ('64dc4ab867261a0d690735c46d7cc9fc60d989da0d69dc04d1714e409cacbdf0', 'https://developer.nvidia.com/compute/cuda/8.0/prod/local_installers/cuda_8.0.44_linux-run')},
     '7.5.18': {
-        'Linux-x86_64': ('08411d536741075131a1858a68615b8b73c51988e616e83b835e4632eea75eec', 'http://developer.download.nvidia.com/compute/cuda/7.5/Prod/local_installers/cuda_7.5.18_linux.run')},
+        'Linux-x86_64': ('08411d536741075131a1858a68615b8b73c51988e616e83b835e4632eea75eec', 'https://developer.download.nvidia.com/compute/cuda/7.5/Prod/local_installers/cuda_7.5.18_linux.run')},
     '6.5.14': {
-        'Linux-x86_64': ('f3e527f34f317314fe8fcd8c85f10560729069298c0f73105ba89225db69da48', 'http://developer.download.nvidia.com/compute/cuda/6_5/rel/installers/cuda_6.5.14_linux_64.run')},
+        'Linux-x86_64': ('f3e527f34f317314fe8fcd8c85f10560729069298c0f73105ba89225db69da48', 'https://developer.download.nvidia.com/compute/cuda/6_5/rel/installers/cuda_6.5.14_linux_64.run')},
 }
 
 
diff --git a/var/spack/repos/builtin/packages/cufflinks/package.py b/var/spack/repos/builtin/packages/cufflinks/package.py
index 514ecb5465..a40768cd54 100644
--- a/var/spack/repos/builtin/packages/cufflinks/package.py
+++ b/var/spack/repos/builtin/packages/cufflinks/package.py
@@ -11,7 +11,7 @@ class Cufflinks(Package):
        for differential expression and regulation in RNA-Seq samples."""
 
     homepage = "https://cole-trapnell-lab.github.io/cufflinks"
-    url      = "http://cole-trapnell-lab.github.io/cufflinks/assets/downloads/cufflinks-2.2.1.Linux_x86_64.tar.gz"
+    url      = "https://cole-trapnell-lab.github.io/cufflinks/assets/downloads/cufflinks-2.2.1.Linux_x86_64.tar.gz"
 
     version('2.2.1', sha256='39f812452cae26462e5d2671d38104d9e8ef30aaf9ab6dea8ca57f50f46448e4')
 
diff --git a/var/spack/repos/builtin/packages/darshan-runtime/package.py b/var/spack/repos/builtin/packages/darshan-runtime/package.py
index 423ba1888e..f2734e2a93 100644
--- a/var/spack/repos/builtin/packages/darshan-runtime/package.py
+++ b/var/spack/repos/builtin/packages/darshan-runtime/package.py
@@ -16,7 +16,7 @@ class DarshanRuntime(AutotoolsPackage):
     systems where you intend to instrument MPI applications."""
 
     homepage = "https://www.mcs.anl.gov/research/projects/darshan/"
-    url      = "http://ftp.mcs.anl.gov/pub/darshan/releases/darshan-3.1.0.tar.gz"
+    url      = "https://ftp.mcs.anl.gov/pub/darshan/releases/darshan-3.1.0.tar.gz"
     git      = "https://github.com/darshan-hpc/darshan.git"
 
     maintainers = ['shanedsnyder', 'carns']
diff --git a/var/spack/repos/builtin/packages/darshan-util/package.py b/var/spack/repos/builtin/packages/darshan-util/package.py
index 6a4348bb75..1e54a57875 100644
--- a/var/spack/repos/builtin/packages/darshan-util/package.py
+++ b/var/spack/repos/builtin/packages/darshan-util/package.py
@@ -13,7 +13,7 @@ class DarshanUtil(AutotoolsPackage):
     log files produced by Darshan (runtime)."""
 
     homepage = "https://www.mcs.anl.gov/research/projects/darshan/"
-    url      = "http://ftp.mcs.anl.gov/pub/darshan/releases/darshan-3.1.0.tar.gz"
+    url      = "https://ftp.mcs.anl.gov/pub/darshan/releases/darshan-3.1.0.tar.gz"
     git      = "https://github.com/darshan-hpc/darshan.git"
 
     maintainers = ['shanedsnyder', 'carns']
diff --git a/var/spack/repos/builtin/packages/dialign-tx/package.py b/var/spack/repos/builtin/packages/dialign-tx/package.py
index 00b316c04b..46a5b7864f 100644
--- a/var/spack/repos/builtin/packages/dialign-tx/package.py
+++ b/var/spack/repos/builtin/packages/dialign-tx/package.py
@@ -11,7 +11,7 @@ class DialignTx(MakefilePackage):
        multiple sequence alignment"""
 
     homepage = "https://dialign-tx.gobics.de/"
-    url      = "http://dialign-tx.gobics.de/DIALIGN-TX_1.0.2.tar.gz"
+    url      = "https://dialign-tx.gobics.de/DIALIGN-TX_1.0.2.tar.gz"
 
     version('1.0.2', sha256='fb3940a48a12875332752a298f619f0da62593189cd257d28932463c7cebcb8f')
 
diff --git a/var/spack/repos/builtin/packages/diffsplice/package.py b/var/spack/repos/builtin/packages/diffsplice/package.py
index a3589c67e8..88d2c49998 100644
--- a/var/spack/repos/builtin/packages/diffsplice/package.py
+++ b/var/spack/repos/builtin/packages/diffsplice/package.py
@@ -12,7 +12,7 @@ class Diffsplice(MakefilePackage):
     transcriptome or pre-determined splice pattern."""
 
     homepage = "http://www.netlab.uky.edu/p/bioinfo/DiffSplice"
-    url      = "http://protocols.netlab.uky.edu/~yin/download/diffsplice/diffsplice_0.1.1.tgz"
+    url      = "https://protocols.netlab.uky.edu/~yin/download/diffsplice/diffsplice_0.1.1.tgz"
 
     version('0.1.2beta', sha256='cc06dcb9f8d98b2184f0dd5863b79bdd6a8cd33b9418e6549b7ea63e90ee1aa6')
     version('0.1.1',     sha256='9740426692b0e5f92b943b127014c1d9815bed2938b5dd9e9d0c5b64abbb5da6')
diff --git a/var/spack/repos/builtin/packages/dire/package.py b/var/spack/repos/builtin/packages/dire/package.py
index 8b88fc5363..6d6325da1d 100644
--- a/var/spack/repos/builtin/packages/dire/package.py
+++ b/var/spack/repos/builtin/packages/dire/package.py
@@ -12,9 +12,9 @@ class Dire(Package):
     collisions."""
 
     homepage = "https://dire.gitlab.io/"
-    url      = "http://dire.gitlab.io/Downloads/DIRE-2.004.tar.gz"
-    git      = "http://gitlab.com/dire/direforpythia"
-    list_url = "http://dire.gitlab.io/Downloads.html"
+    url      = "https://dire.gitlab.io/Downloads/DIRE-2.004.tar.gz"
+    git      = "https://gitlab.com/dire/direforpythia"
+    list_url = "https://dire.gitlab.io/Downloads.html"
 
     tags = ['hep']
 
diff --git a/var/spack/repos/builtin/packages/docbook-xml/package.py b/var/spack/repos/builtin/packages/docbook-xml/package.py
index bcfed0ba60..eeb29d4b32 100644
--- a/var/spack/repos/builtin/packages/docbook-xml/package.py
+++ b/var/spack/repos/builtin/packages/docbook-xml/package.py
@@ -159,11 +159,11 @@ class DocbookXml(Package):
                    'file://{0}/isotech.ent'.format(ent_dir),
                    docbook)
         xmlcatalog('--noout', '--add', 'rewriteSystem',
-                   'http://www.oasis-open.org/docbook/xml/{0}'.format(version),
+                   'https://www.oasis-open.org/docbook/xml/{0}'.format(version),
                    'file://{0}'.format(prefix),
                    docbook)
         xmlcatalog('--noout', '--add', 'rewriteURI',
-                   'http://www.oasis-open.org/docbook/xml/{0}'.format(version),
+                   'https://www.oasis-open.org/docbook/xml/{0}'.format(version),
                    'file://{0}'.format(prefix),
                    docbook)
 
@@ -182,11 +182,11 @@ class DocbookXml(Package):
                    'file://{0}'.format(docbook),
                    catalog)
         xmlcatalog('--noout', '--add', 'delegateSystem',
-                   'http://www.oasis-open.org/docbook/',
+                   'https://www.oasis-open.org/docbook/',
                    'file://{0}'.format(docbook),
                    catalog)
         xmlcatalog('--noout', '--add', 'delegateURI',
-                   'http://www.oasis-open.org/docbook/',
+                   'https://www.oasis-open.org/docbook/',
                    'file://{0}'.format(docbook),
                    catalog)
 
diff --git a/var/spack/repos/builtin/packages/docbook-xsl/package.py b/var/spack/repos/builtin/packages/docbook-xsl/package.py
index e3089d62eb..25bf3e52c4 100644
--- a/var/spack/repos/builtin/packages/docbook-xsl/package.py
+++ b/var/spack/repos/builtin/packages/docbook-xsl/package.py
@@ -37,13 +37,13 @@ class DocbookXsl(Package):
         # create catalog
         xmlcatalog('--noout', '--create', catalog)
         xmlcatalog('--noout', '--add', 'system',
-                   'http://www.w3.org/2001/xml.xsd', xml_xsd, catalog)
+                   'https://www.w3.org/2001/xml.xsd', xml_xsd, catalog)
         xmlcatalog('--noout', '--add', 'system',
-                   'http://www.w3.org/2009/01/xml.xsd', xml_xsd, catalog)
+                   'https://www.w3.org/2009/01/xml.xsd', xml_xsd, catalog)
         xmlcatalog('--noout', '--add', 'uri',
-                   'http://www.w3.org/2001/xml.xsd', xml_xsd, catalog)
+                   'https://www.w3.org/2001/xml.xsd', xml_xsd, catalog)
         xmlcatalog('--noout', '--add', 'uri',
-                   'http://www.w3.org/2009/01/xml.xsd', xml_xsd, catalog)
+                   'https://www.w3.org/2009/01/xml.xsd', xml_xsd, catalog)
 
         docbook_urls = ['docbook.sourceforge.net', 'cdn.docbook.org']
         docbook_rewrites = ['rewriteSystem', 'rewriteURI']
diff --git a/var/spack/repos/builtin/packages/dray/package.py b/var/spack/repos/builtin/packages/dray/package.py
index 1ea062b104..737e428579 100644
--- a/var/spack/repos/builtin/packages/dray/package.py
+++ b/var/spack/repos/builtin/packages/dray/package.py
@@ -127,7 +127,7 @@ class Dray(Package, CudaPackage):
         all of the options used to configure and build ascent.
 
         For more details about 'host-config' files see:
-            http://ascent.readthedocs.io/en/latest/BuildingAscent.html
+            https://ascent.readthedocs.io/en/latest/BuildingAscent.html
         """
 
         #######################
diff --git a/var/spack/repos/builtin/packages/dsdp/package.py b/var/spack/repos/builtin/packages/dsdp/package.py
index c13f2f5f20..9b71f0ed14 100644
--- a/var/spack/repos/builtin/packages/dsdp/package.py
+++ b/var/spack/repos/builtin/packages/dsdp/package.py
@@ -17,7 +17,7 @@ class Dsdp(MakefilePackage):
     certificates of infeasibility when no feasible solution exists."""
 
     homepage = "https://www.mcs.anl.gov/hs/software/DSDP/"
-    url      = "http://www.mcs.anl.gov/hs/software/DSDP/DSDP5.8.tar.gz"
+    url      = "https://www.mcs.anl.gov/hs/software/DSDP/DSDP5.8.tar.gz"
 
     version('5.8', sha256='26aa624525a636de272c0b329e2dfd01a0d5b7827f1c1c76f393d71e37dead70')
 
diff --git a/var/spack/repos/builtin/packages/elsi/package.py b/var/spack/repos/builtin/packages/elsi/package.py
index b7669415bd..6f514aa708 100644
--- a/var/spack/repos/builtin/packages/elsi/package.py
+++ b/var/spack/repos/builtin/packages/elsi/package.py
@@ -14,7 +14,7 @@ class Elsi(CMakePackage):
     codes to a variety of eigenvalue solvers."""
 
     homepage = "https://wordpress.elsi-interchange.org/"
-    url      = "http://wordpress.elsi-interchange.org/wp-content/uploads/2019/03/elsi-2.2.1.tar.gz"
+    url      = "https://wordpress.elsi-interchange.org/wp-content/uploads/2019/03/elsi-2.2.1.tar.gz"
 
     version('2.2.1', sha256='5b4b2e8fa4b3b68131fe02cc1803a884039b89a1b1138af474af66453bec0b4d')
 
diff --git a/var/spack/repos/builtin/packages/eospac/package.py b/var/spack/repos/builtin/packages/eospac/package.py
index 19434c1b78..1f17d41137 100644
--- a/var/spack/repos/builtin/packages/eospac/package.py
+++ b/var/spack/repos/builtin/packages/eospac/package.py
@@ -13,7 +13,7 @@ class Eospac(Package):
     """
 
     homepage = "https://laws.lanl.gov/projects/data/eos.html"
-    list_url = "http://laws.lanl.gov/projects/data/eos/eospacReleases.php"
+    list_url = "https://laws.lanl.gov/projects/data/eos/eospacReleases.php"
     maintainers = ['KineticTheory']
 
     # An EOSPAC release labeled "beta" doesn't always imply that the
diff --git a/var/spack/repos/builtin/packages/exmcutils/package.py b/var/spack/repos/builtin/packages/exmcutils/package.py
index 563d908bc1..34bc912da1 100644
--- a/var/spack/repos/builtin/packages/exmcutils/package.py
+++ b/var/spack/repos/builtin/packages/exmcutils/package.py
@@ -11,7 +11,7 @@ class Exmcutils(AutotoolsPackage):
     """ExM C-Utils: Generic C utility library for ADLB/X and Swift/T"""
 
     homepage = 'http://swift-lang.org/Swift-T'
-    url      = 'http://swift-lang.github.io/swift-t-downloads/spack/exmcutils-0.6.0.tar.gz'
+    url      = 'https://swift-lang.github.io/swift-t-downloads/spack/exmcutils-0.6.0.tar.gz'
     git      = "https://github.com/swift-lang/swift-t.git"
 
     version('master', branch='master')
diff --git a/var/spack/repos/builtin/packages/exonerate/package.py b/var/spack/repos/builtin/packages/exonerate/package.py
index 53dc7e6bdc..a58cf9b6a0 100644
--- a/var/spack/repos/builtin/packages/exonerate/package.py
+++ b/var/spack/repos/builtin/packages/exonerate/package.py
@@ -10,7 +10,7 @@ class Exonerate(AutotoolsPackage):
     """Pairwise sequence alignment of DNA and proteins"""
 
     homepage = "https://www.ebi.ac.uk/about/vertebrate-genomics/software/exonerate"
-    url      = "http://ftp.ebi.ac.uk/pub/software/vertebrategenomics/exonerate/exonerate-2.4.0.tar.gz"
+    url      = "https://ftp.ebi.ac.uk/pub/software/vertebrategenomics/exonerate/exonerate-2.4.0.tar.gz"
 
     version('2.4.0', sha256='f849261dc7c97ef1f15f222e955b0d3daf994ec13c9db7766f1ac7e77baa4042')
 
diff --git a/var/spack/repos/builtin/packages/f2c/package.py b/var/spack/repos/builtin/packages/f2c/package.py
index 3fe7f68216..4dcef998be 100644
--- a/var/spack/repos/builtin/packages/f2c/package.py
+++ b/var/spack/repos/builtin/packages/f2c/package.py
@@ -15,7 +15,7 @@ class F2c(MakefilePackage):
     version('master', sha256='d4847456aa91c74e5e61e2097780ca6ac3b20869fae8864bfa8dcc66f6721d35')
 
     def url_for_version(self, version):
-        url = "http://www.netlib.org/f2c/src.tgz"
+        url = "https://www.netlib.org/f2c/src.tgz"
         return url
 
     def edit(self, spec, prefix):
diff --git a/var/spack/repos/builtin/packages/ffmpeg/package.py b/var/spack/repos/builtin/packages/ffmpeg/package.py
index 0e7e66f562..b0d05d3501 100644
--- a/var/spack/repos/builtin/packages/ffmpeg/package.py
+++ b/var/spack/repos/builtin/packages/ffmpeg/package.py
@@ -11,7 +11,7 @@ class Ffmpeg(AutotoolsPackage):
     convert and stream audio and video."""
 
     homepage = "https://ffmpeg.org"
-    url      = "http://ffmpeg.org/releases/ffmpeg-4.1.1.tar.bz2"
+    url      = "https://ffmpeg.org/releases/ffmpeg-4.1.1.tar.bz2"
 
     maintainers = ['xjrc']
 
diff --git a/var/spack/repos/builtin/packages/fftw/package.py b/var/spack/repos/builtin/packages/fftw/package.py
index b791f9eec1..5325545984 100644
--- a/var/spack/repos/builtin/packages/fftw/package.py
+++ b/var/spack/repos/builtin/packages/fftw/package.py
@@ -208,8 +208,8 @@ class Fftw(FftwBase):
        library of choice for most applications."""
 
     homepage = "https://www.fftw.org"
-    url = "http://www.fftw.org/fftw-3.3.4.tar.gz"
-    list_url = "http://www.fftw.org/download.html"
+    url = "https://www.fftw.org/fftw-3.3.4.tar.gz"
+    list_url = "https://www.fftw.org/download.html"
 
     version('3.3.9', sha256='bf2c7ce40b04ae811af714deb512510cc2c17b9ab9d6ddcf49fe4487eea7af3d')
     version('3.3.8', sha256='6113262f6e92c5bd474f2875fa1b01054c4ad5040f6b0da7c03c98821d9ae303')
diff --git a/var/spack/repos/builtin/packages/fjcontrib/package.py b/var/spack/repos/builtin/packages/fjcontrib/package.py
index 3bc78f346b..0e5b89dbdb 100644
--- a/var/spack/repos/builtin/packages/fjcontrib/package.py
+++ b/var/spack/repos/builtin/packages/fjcontrib/package.py
@@ -12,7 +12,7 @@ class Fjcontrib(AutotoolsPackage):
     """3rd party extensions of FastJet"""
 
     homepage = "https://fastjet.hepforge.org/contrib/"
-    url      = "http://fastjet.hepforge.org/contrib/downloads/fjcontrib-1.044.tar.gz"
+    url      = "https://fastjet.hepforge.org/contrib/downloads/fjcontrib-1.044.tar.gz"
 
     tags = ['hep']
 
diff --git a/var/spack/repos/builtin/packages/flink/package.py b/var/spack/repos/builtin/packages/flink/package.py
index 84881b13d1..95c2a9b501 100644
--- a/var/spack/repos/builtin/packages/flink/package.py
+++ b/var/spack/repos/builtin/packages/flink/package.py
@@ -13,7 +13,7 @@ class Flink(Package):
     """
 
     homepage = "https://flink.apache.org/"
-    url      = "http://archive.apache.org/dist/flink/flink-1.9.1/flink-1.9.1-bin-scala_2.11.tgz"
+    url      = "https://archive.apache.org/dist/flink/flink-1.9.1/flink-1.9.1-bin-scala_2.11.tgz"
 
     version('1.9.1', sha256='f69de344cd593e92f8261e19ae8a47b3910e9a70a7cd1ccfb1ecd1ff000b93ea')
     version('1.9.0', sha256='a2245f68309e94ed54d86a680232a518aed9c5ea030bcc0b298bc8f27165eeb7')
diff --git a/var/spack/repos/builtin/packages/flint/package.py b/var/spack/repos/builtin/packages/flint/package.py
index 33ac3bdeb5..1aa5726e21 100644
--- a/var/spack/repos/builtin/packages/flint/package.py
+++ b/var/spack/repos/builtin/packages/flint/package.py
@@ -10,7 +10,7 @@ class Flint(Package):
     """FLINT (Fast Library for Number Theory)."""
 
     homepage = "https://www.flintlib.org"
-    url      = "http://mirrors.mit.edu/sage/spkg/upstream/flint/flint-2.5.2.tar.gz"
+    url      = "https://mirrors.mit.edu/sage/spkg/upstream/flint/flint-2.5.2.tar.gz"
     git      = "https://github.com/wbhart/flint2.git"
 
     version('develop', branch='trunk')
diff --git a/var/spack/repos/builtin/packages/fontconfig/package.py b/var/spack/repos/builtin/packages/fontconfig/package.py
index 5369b253e1..f88c4a6aef 100644
--- a/var/spack/repos/builtin/packages/fontconfig/package.py
+++ b/var/spack/repos/builtin/packages/fontconfig/package.py
@@ -9,7 +9,7 @@ from spack import *
 class Fontconfig(AutotoolsPackage):
     """Fontconfig is a library for configuring/customizing font access"""
     homepage = "https://www.freedesktop.org/wiki/Software/fontconfig/"
-    url      = "http://www.freedesktop.org/software/fontconfig/release/fontconfig-2.12.3.tar.gz"
+    url      = "https://www.freedesktop.org/software/fontconfig/release/fontconfig-2.12.3.tar.gz"
 
     version('2.13.93', sha256='0f302a18ee52dde0793fe38b266bf269dfe6e0c0ae140e30d72c6cca5dc08db5')
     version('2.13.1', sha256='9f0d852b39d75fc655f9f53850eb32555394f36104a044bb2b2fc9e66dbbfa7f')
diff --git a/var/spack/repos/builtin/packages/fqtrim/package.py b/var/spack/repos/builtin/packages/fqtrim/package.py
index 63db979103..bc5edf142d 100644
--- a/var/spack/repos/builtin/packages/fqtrim/package.py
+++ b/var/spack/repos/builtin/packages/fqtrim/package.py
@@ -13,7 +13,7 @@ class Fqtrim(MakefilePackage):
     machines."""
 
     homepage = "https://ccb.jhu.edu/software/fqtrim/"
-    url      = "http://ccb.jhu.edu/software/fqtrim/dl/fqtrim-0.9.7.tar.gz"
+    url      = "https://ccb.jhu.edu/software/fqtrim/dl/fqtrim-0.9.7.tar.gz"
 
     version('0.9.7', sha256='4951538f69dde14a23fc4841ff020434d26eb9622c4e06b43c068c702aa3d0d6')
 
diff --git a/var/spack/repos/builtin/packages/fsl/package.py b/var/spack/repos/builtin/packages/fsl/package.py
index 2629a241bc..2dfafa2c69 100644
--- a/var/spack/repos/builtin/packages/fsl/package.py
+++ b/var/spack/repos/builtin/packages/fsl/package.py
@@ -16,7 +16,7 @@ class Fsl(Package, CudaPackage):
     # NOTE: A manual download is required for FSL.  Spack will search your
     # current directory for the download file.  Alternatively, add this file to
     # a mirror so that Spack can find it.  For instructions on how to set up a
-    # mirror, see http://spack.readthedocs.io/en/latest/mirrors.html
+    # mirror, see https://spack.readthedocs.io/en/latest/mirrors.html
 
     homepage = "https://fsl.fmrib.ox.ac.uk"
     url      = "file://{0}/fsl-5.0.10-sources.tar.gz".format(os.getcwd())
diff --git a/var/spack/repos/builtin/packages/g4abla/package.py b/var/spack/repos/builtin/packages/g4abla/package.py
index b0b25b9028..d9cd0ef726 100644
--- a/var/spack/repos/builtin/packages/g4abla/package.py
+++ b/var/spack/repos/builtin/packages/g4abla/package.py
@@ -10,7 +10,7 @@ from spack import *
 class G4abla(Package):
     """Geant4 data for nuclear shell effects in INCL/ABLA hadronic mode"""
     homepage = "https://geant4.web.cern.ch"
-    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4ABLA.3.0.tar.gz"
+    url = "https://geant4-data.web.cern.ch/geant4-data/datasets/G4ABLA.3.0.tar.gz"
 
     tags = ['hep']
 
diff --git a/var/spack/repos/builtin/packages/g4emlow/package.py b/var/spack/repos/builtin/packages/g4emlow/package.py
index 7c6fabb443..6d3aaa6f22 100644
--- a/var/spack/repos/builtin/packages/g4emlow/package.py
+++ b/var/spack/repos/builtin/packages/g4emlow/package.py
@@ -10,7 +10,7 @@ from spack import *
 class G4emlow(Package):
     """Geant4 data files for low energy electromagnetic processes."""
     homepage = "https://geant4.web.cern.ch"
-    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4EMLOW.6.50.tar.gz"
+    url = "https://geant4-data.web.cern.ch/geant4-data/datasets/G4EMLOW.6.50.tar.gz"
 
     tags = ['hep']
 
@@ -37,4 +37,4 @@ class G4emlow(Package):
 
     def url_for_version(self, version):
         """Handle version string."""
-        return ("http://geant4-data.web.cern.ch/geant4-data/datasets/G4EMLOW.%s.tar.gz" % version)
+        return ("https://geant4-data.web.cern.ch/geant4-data/datasets/G4EMLOW.%s.tar.gz" % version)
diff --git a/var/spack/repos/builtin/packages/g4ensdfstate/package.py b/var/spack/repos/builtin/packages/g4ensdfstate/package.py
index bfaa5567be..911bc67be4 100644
--- a/var/spack/repos/builtin/packages/g4ensdfstate/package.py
+++ b/var/spack/repos/builtin/packages/g4ensdfstate/package.py
@@ -10,7 +10,7 @@ from spack import *
 class G4ensdfstate(Package):
     """Geant4 data for nuclides properties"""
     homepage = "https://geant4.web.cern.ch"
-    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4ENSDFSTATE.2.1.tar.gz"
+    url = "https://geant4-data.web.cern.ch/geant4-data/datasets/G4ENSDFSTATE.2.1.tar.gz"
 
     tags = ['hep']
 
diff --git a/var/spack/repos/builtin/packages/g4incl/package.py b/var/spack/repos/builtin/packages/g4incl/package.py
index 57cc06bccf..07a77aa416 100644
--- a/var/spack/repos/builtin/packages/g4incl/package.py
+++ b/var/spack/repos/builtin/packages/g4incl/package.py
@@ -11,7 +11,7 @@ class G4incl(Package):
     """Geant4 data for evaluated particle cross-sections on natural
     composition of elements"""
     homepage = "https://geant4.web.cern.ch"
-    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4INCL.1.0.tar.gz"
+    url = "https://geant4-data.web.cern.ch/geant4-data/datasets/G4INCL.1.0.tar.gz"
 
     tags = ['hep']
 
diff --git a/var/spack/repos/builtin/packages/g4ndl/package.py b/var/spack/repos/builtin/packages/g4ndl/package.py
index 86645b2826..0e655fb875 100644
--- a/var/spack/repos/builtin/packages/g4ndl/package.py
+++ b/var/spack/repos/builtin/packages/g4ndl/package.py
@@ -10,7 +10,7 @@ from spack import *
 class G4ndl(Package):
     """Geant4 Neutron data files with thermal cross sections """
     homepage = "https://geant4.web.cern.ch"
-    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4NDL.4.5.tar.gz"
+    url = "https://geant4-data.web.cern.ch/geant4-data/datasets/G4NDL.4.5.tar.gz"
 
     tags = ['hep']
 
diff --git a/var/spack/repos/builtin/packages/g4neutronxs/package.py b/var/spack/repos/builtin/packages/g4neutronxs/package.py
index dd76c7068f..c083e3f9c6 100644
--- a/var/spack/repos/builtin/packages/g4neutronxs/package.py
+++ b/var/spack/repos/builtin/packages/g4neutronxs/package.py
@@ -11,7 +11,7 @@ class G4neutronxs(Package):
     """Geant4 data for evaluated neutron cross-sections on natural composition
        of elements"""
     homepage = "https://geant4.web.cern.ch"
-    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4NEUTRONXS.1.4.tar.gz"
+    url = "https://geant4-data.web.cern.ch/geant4-data/datasets/G4NEUTRONXS.1.4.tar.gz"
 
     tags = ['hep']
 
diff --git a/var/spack/repos/builtin/packages/g4particlexs/package.py b/var/spack/repos/builtin/packages/g4particlexs/package.py
index 8bc3a28b93..982d5fdba4 100644
--- a/var/spack/repos/builtin/packages/g4particlexs/package.py
+++ b/var/spack/repos/builtin/packages/g4particlexs/package.py
@@ -11,7 +11,7 @@ class G4particlexs(Package):
     """Geant4 data for evaluated particle cross-sections on
     natural composition of elements"""
     homepage = "https://geant4.web.cern.ch"
-    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4PARTICLEXS.2.1.tar.gz"
+    url = "https://geant4-data.web.cern.ch/geant4-data/datasets/G4PARTICLEXS.2.1.tar.gz"
 
     tags = ['hep']
 
diff --git a/var/spack/repos/builtin/packages/g4photonevaporation/package.py b/var/spack/repos/builtin/packages/g4photonevaporation/package.py
index ec5d8a676a..8218c8e0d8 100644
--- a/var/spack/repos/builtin/packages/g4photonevaporation/package.py
+++ b/var/spack/repos/builtin/packages/g4photonevaporation/package.py
@@ -10,7 +10,7 @@ from spack import *
 class G4photonevaporation(Package):
     """Geant4 data for photon evaporation"""
     homepage = "https://geant4.web.cern.ch"
-    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4PhotonEvaporation.4.3.2.tar.gz"
+    url = "https://geant4-data.web.cern.ch/geant4-data/datasets/G4PhotonEvaporation.4.3.2.tar.gz"
 
     tags = ['hep']
 
diff --git a/var/spack/repos/builtin/packages/g4pii/package.py b/var/spack/repos/builtin/packages/g4pii/package.py
index 45a1ed019b..702361e0b7 100644
--- a/var/spack/repos/builtin/packages/g4pii/package.py
+++ b/var/spack/repos/builtin/packages/g4pii/package.py
@@ -10,7 +10,7 @@ from spack import *
 class G4pii(Package):
     """Geant4 data for shell ionisation cross-sections"""
     homepage = "https://geant4.web.cern.ch"
-    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4PII.1.3.tar.gz"
+    url = "https://geant4-data.web.cern.ch/geant4-data/datasets/G4PII.1.3.tar.gz"
 
     tags = ['hep']
 
@@ -32,4 +32,4 @@ class G4pii(Package):
 
     def url_for_version(self, version):
         """Handle version string."""
-        return ("http://geant4-data.web.cern.ch/geant4-data/datasets/G4PII.1.3.tar.gz" % version)
+        return ("https://geant4-data.web.cern.ch/geant4-data/datasets/G4PII.1.3.tar.gz" % version)
diff --git a/var/spack/repos/builtin/packages/g4radioactivedecay/package.py b/var/spack/repos/builtin/packages/g4radioactivedecay/package.py
index 09884b3598..44d648ba79 100644
--- a/var/spack/repos/builtin/packages/g4radioactivedecay/package.py
+++ b/var/spack/repos/builtin/packages/g4radioactivedecay/package.py
@@ -10,7 +10,7 @@ from spack import *
 class G4radioactivedecay(Package):
     """Geant4 data files for radio-active decay hadronic processes"""
     homepage = "https://geant4.web.cern.ch"
-    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4RadioactiveDecay.5.1.1.tar.gz"
+    url = "https://geant4-data.web.cern.ch/geant4-data/datasets/G4RadioactiveDecay.5.1.1.tar.gz"
 
     tags = ['hep']
 
diff --git a/var/spack/repos/builtin/packages/g4realsurface/package.py b/var/spack/repos/builtin/packages/g4realsurface/package.py
index 3c69010c24..3894d88d89 100644
--- a/var/spack/repos/builtin/packages/g4realsurface/package.py
+++ b/var/spack/repos/builtin/packages/g4realsurface/package.py
@@ -10,7 +10,7 @@ from spack import *
 class G4realsurface(Package):
     """Geant4 data for measured optical surface reflectance"""
     homepage = "https://geant4.web.cern.ch"
-    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/RealSurface.1.0.tar.gz"
+    url = "https://geant4-data.web.cern.ch/geant4-data/datasets/RealSurface.1.0.tar.gz"
 
     tags = ['hep']
 
diff --git a/var/spack/repos/builtin/packages/g4saiddata/package.py b/var/spack/repos/builtin/packages/g4saiddata/package.py
index 12084cf5d1..dc08f31020 100644
--- a/var/spack/repos/builtin/packages/g4saiddata/package.py
+++ b/var/spack/repos/builtin/packages/g4saiddata/package.py
@@ -10,7 +10,7 @@ from spack import *
 class G4saiddata(Package):
     """Geant4 data from evaluated cross-sections in SAID data-base """
     homepage = "https://geant4.web.cern.ch"
-    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4SAIDDATA.1.1.tar.gz"
+    url = "https://geant4-data.web.cern.ch/geant4-data/datasets/G4SAIDDATA.1.1.tar.gz"
 
     tags = ['hep']
 
diff --git a/var/spack/repos/builtin/packages/g4tendl/package.py b/var/spack/repos/builtin/packages/g4tendl/package.py
index 9824fe9800..ff180c102f 100644
--- a/var/spack/repos/builtin/packages/g4tendl/package.py
+++ b/var/spack/repos/builtin/packages/g4tendl/package.py
@@ -10,7 +10,7 @@ from spack import *
 class G4tendl(Package):
     """Geant4 data for incident particles [optional]"""
     homepage = "https://geant4.web.cern.ch"
-    url = "http://geant4-data.web.cern.ch/geant4-data/datasets/G4TENDL.1.3.tar.gz"
+    url = "https://geant4-data.web.cern.ch/geant4-data/datasets/G4TENDL.1.3.tar.gz"
 
     tags = ['hep']
 
diff --git a/var/spack/repos/builtin/packages/ganglia/package.py b/var/spack/repos/builtin/packages/ganglia/package.py
index 3a00ee424f..1c70084c5b 100644
--- a/var/spack/repos/builtin/packages/ganglia/package.py
+++ b/var/spack/repos/builtin/packages/ganglia/package.py
@@ -13,7 +13,7 @@ class Ganglia(AutotoolsPackage):
     nodes in size."""
 
     homepage = "http://ganglia.sourceforge.net/"
-    url      = "http://jaist.dl.sourceforge.net/project/ganglia/ganglia%20monitoring%20core/3.7.2/ganglia-3.7.2.tar.gz"
+    url      = "https://jaist.dl.sourceforge.net/project/ganglia/ganglia%20monitoring%20core/3.7.2/ganglia-3.7.2.tar.gz"
     list_url = "http://jaist.dl.sourceforge.net/project/ganglia/ganglia%20monitoring%20core"
     list_depth = 1
 
diff --git a/var/spack/repos/builtin/packages/gapfiller/package.py b/var/spack/repos/builtin/packages/gapfiller/package.py
index c613fc692c..50d5ac9624 100644
--- a/var/spack/repos/builtin/packages/gapfiller/package.py
+++ b/var/spack/repos/builtin/packages/gapfiller/package.py
@@ -17,7 +17,7 @@ class Gapfiller(Package):
        Spack will search your current directory for the download file.
        Alternatively, add this file to a mirror so that Spack can find it.
        For instructions on how to set up a mirror, see
-       http://spack.readthedocs.io/en/latest/mirrors.html"""
+       https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "https://www.baseclear.com/genomics/bioinformatics/basetools/gapfiller"
     manual_download = True
diff --git a/var/spack/repos/builtin/packages/gcc/package.py b/var/spack/repos/builtin/packages/gcc/package.py
index 006b059757..8b341a6685 100644
--- a/var/spack/repos/builtin/packages/gcc/package.py
+++ b/var/spack/repos/builtin/packages/gcc/package.py
@@ -22,7 +22,7 @@ class Gcc(AutotoolsPackage, GNUMirrorPackage):
     homepage = 'https://gcc.gnu.org'
     gnu_mirror_path = 'gcc/gcc-9.2.0/gcc-9.2.0.tar.xz'
     git      = 'git://gcc.gnu.org/git/gcc.git'
-    list_url = 'http://ftp.gnu.org/gnu/gcc/'
+    list_url = 'https://ftp.gnu.org/gnu/gcc/'
     list_depth = 1
 
     maintainers = ['michaelkuhn', 'alalazo']
diff --git a/var/spack/repos/builtin/packages/genemark-et/package.py b/var/spack/repos/builtin/packages/genemark-et/package.py
index 4dbc3b0960..89c96fbdd3 100644
--- a/var/spack/repos/builtin/packages/genemark-et/package.py
+++ b/var/spack/repos/builtin/packages/genemark-et/package.py
@@ -16,7 +16,7 @@ class GenemarkEt(Package):
        Spack will search your current directory for the download file.
        Alternatively, add this file to a mirror so that Spack can find it.
        For instructions on how to set up a mirror, see
-       http://spack.readthedocs.io/en/latest/mirrors.html"""
+       https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "http://topaz.gatech.edu/GeneMark"
     manual_download = True
diff --git a/var/spack/repos/builtin/packages/ghostscript/package.py b/var/spack/repos/builtin/packages/ghostscript/package.py
index 25b16842bd..c129b97b32 100644
--- a/var/spack/repos/builtin/packages/ghostscript/package.py
+++ b/var/spack/repos/builtin/packages/ghostscript/package.py
@@ -63,7 +63,7 @@ class Ghostscript(AutotoolsPackage):
         we have to remove these vendored dependencies.
 
         Note that this approach is also recommended by Linux from Scratch:
-        http://www.linuxfromscratch.org/blfs/view/svn/pst/gs.html
+        https://www.linuxfromscratch.org/blfs/view/svn/pst/gs.html
         """
         directories = ['freetype', 'jpeg', 'libpng', 'zlib']
         if self.spec.satisfies('@:9.21'):
diff --git a/var/spack/repos/builtin/packages/gl2ps/package.py b/var/spack/repos/builtin/packages/gl2ps/package.py
index 1909d6fc4b..cd8005eb4b 100644
--- a/var/spack/repos/builtin/packages/gl2ps/package.py
+++ b/var/spack/repos/builtin/packages/gl2ps/package.py
@@ -11,7 +11,7 @@ class Gl2ps(CMakePackage):
     OpenGL application."""
 
     homepage = "https://www.geuz.org/gl2ps/"
-    url      = "http://geuz.org/gl2ps/src/gl2ps-1.3.9.tgz"
+    url      = "https://geuz.org/gl2ps/src/gl2ps-1.3.9.tgz"
 
     version('1.4.0', sha256='03cb5e6dfcd87183f3b9ba3b22f04cd155096af81e52988cc37d8d8efe6cf1e2')
     version('1.3.9', sha256='8a680bff120df8bcd78afac276cdc38041fed617f2721bade01213362bcc3640')
diff --git a/var/spack/repos/builtin/packages/glvis/package.py b/var/spack/repos/builtin/packages/glvis/package.py
index 10af32e474..6c9615d1da 100644
--- a/var/spack/repos/builtin/packages/glvis/package.py
+++ b/var/spack/repos/builtin/packages/glvis/package.py
@@ -24,7 +24,7 @@ class Glvis(MakefilePackage):
     # 1. Verify that no checksums on old versions have changed.
     #
     # 2. Verify that the shortened URL for the new version is listed at:
-    #    http://glvis.org/download/
+    #    https://glvis.org/download/
     #
     # 3. Use http://getlinkinfo.com or similar to verify that the
     #    underling download link for the latest version comes has the
diff --git a/var/spack/repos/builtin/packages/graphviz/package.py b/var/spack/repos/builtin/packages/graphviz/package.py
index 70d1985384..7ca0764b46 100644
--- a/var/spack/repos/builtin/packages/graphviz/package.py
+++ b/var/spack/repos/builtin/packages/graphviz/package.py
@@ -62,7 +62,7 @@ class Graphviz(AutotoolsPackage):
     variant('x', default=False,
             description='Use the X Window System')
 
-    patch('http://www.linuxfromscratch.org/patches/blfs/9.0/graphviz-2.40.1-qt5-1.patch',
+    patch('https://www.linuxfromscratch.org/patches/blfs/9.0/graphviz-2.40.1-qt5-1.patch',
           sha256='bd532df325df811713e311d17aaeac3f5d6075ea4fd0eae8d989391e6afba930',
           when='@:2.40+qt^qt@5:')
     patch('https://raw.githubusercontent.com/easybuilders/easybuild-easyconfigs/master/easybuild/easyconfigs/g/Graphviz/Graphviz-2.38.0_icc_sfio.patch',
diff --git a/var/spack/repos/builtin/packages/grass/package.py b/var/spack/repos/builtin/packages/grass/package.py
index 588de1ad47..f34b9b316a 100644
--- a/var/spack/repos/builtin/packages/grass/package.py
+++ b/var/spack/repos/builtin/packages/grass/package.py
@@ -58,7 +58,7 @@ class Grass(AutotoolsPackage):
     variant('geos',      default=False, description='Enable GEOS support')
     variant('x',         default=False, description='Use the X Window System')
 
-    # http://htmlpreview.github.io/?https://github.com/OSGeo/grass/blob/master/REQUIREMENTS.html
+    # https://htmlpreview.github.io/?https://github.com/OSGeo/grass/blob/master/REQUIREMENTS.html
     # General requirements
     depends_on('gmake@3.81:', type='build')
     depends_on('iconv')
diff --git a/var/spack/repos/builtin/packages/gromacs/package.py b/var/spack/repos/builtin/packages/gromacs/package.py
index 221be3a4f4..795fae429a 100644
--- a/var/spack/repos/builtin/packages/gromacs/package.py
+++ b/var/spack/repos/builtin/packages/gromacs/package.py
@@ -20,7 +20,7 @@ class Gromacs(CMakePackage):
     """
 
     homepage = 'http://www.gromacs.org'
-    url      = 'http://ftp.gromacs.org/gromacs/gromacs-5.1.2.tar.gz'
+    url      = 'https://ftp.gromacs.org/gromacs/gromacs-5.1.2.tar.gz'
     git      = 'https://github.com/gromacs/gromacs.git'
     maintainers = ['junghans', 'marvinbernhardt']
 
diff --git a/var/spack/repos/builtin/packages/gtkorvo-enet/package.py b/var/spack/repos/builtin/packages/gtkorvo-enet/package.py
index ef77a1e430..3b199f4591 100644
--- a/var/spack/repos/builtin/packages/gtkorvo-enet/package.py
+++ b/var/spack/repos/builtin/packages/gtkorvo-enet/package.py
@@ -10,7 +10,7 @@ class GtkorvoEnet(AutotoolsPackage):
     """ENet reliable UDP networking library.
     This is a downstream branch of lsalzman's ENet.
     This version has expanded the client ID to handle more clients.
-    The original is at http://github.com/lsalzman/enet.
+    The original is at https://github.com/lsalzman/enet.
     """
 
     homepage = "https://www.github.com/GTkorvo/enet"
diff --git a/var/spack/repos/builtin/packages/gurobi/package.py b/var/spack/repos/builtin/packages/gurobi/package.py
index 5b2c5a71c8..132b9b4ed8 100644
--- a/var/spack/repos/builtin/packages/gurobi/package.py
+++ b/var/spack/repos/builtin/packages/gurobi/package.py
@@ -18,7 +18,7 @@ class Gurobi(Package):
     # search your current directory for the download file. Alternatively, add
     # this file to a mirror so that Spack can find it. For instructions on how
     # to set up a mirror, see
-    # http://spack.readthedocs.io/en/latest/mirrors.html
+    # https://spack.readthedocs.io/en/latest/mirrors.html
 
     homepage = "https://www.gurobi.com/index"
     manual_download = True
diff --git a/var/spack/repos/builtin/packages/h5hut/package.py b/var/spack/repos/builtin/packages/h5hut/package.py
index 6d6e61ccd2..15e62b3afe 100644
--- a/var/spack/repos/builtin/packages/h5hut/package.py
+++ b/var/spack/repos/builtin/packages/h5hut/package.py
@@ -12,7 +12,7 @@ class H5hut(AutotoolsPackage):
     High-Performance I/O Library for Particle-based Simulations."""
 
     homepage = "https://amas.psi.ch/H5hut/"
-    url      = "http://amas.web.psi.ch/Downloads/H5hut/H5hut-2.0.0rc3.tar.gz"
+    url      = "https://amas.web.psi.ch/Downloads/H5hut/H5hut-2.0.0rc3.tar.gz"
 
     version('2.0.0rc3', sha256='1ca9a9478a99e1811ecbca3c02cc49258050d339ffb1a170006eab4ab2a01790')
 
diff --git a/var/spack/repos/builtin/packages/harfbuzz/package.py b/var/spack/repos/builtin/packages/harfbuzz/package.py
index dd8307cc3f..fa384bca57 100644
--- a/var/spack/repos/builtin/packages/harfbuzz/package.py
+++ b/var/spack/repos/builtin/packages/harfbuzz/package.py
@@ -9,7 +9,7 @@ from spack import *
 class Harfbuzz(AutotoolsPackage):
     """The Harfbuzz package contains an OpenType text shaping engine."""
     homepage = "https://github.com/harfbuzz/harfbuzz"
-    url      = "http://www.freedesktop.org/software/harfbuzz/release/harfbuzz-0.9.37.tar.bz2"
+    url      = "https://www.freedesktop.org/software/harfbuzz/release/harfbuzz-0.9.37.tar.bz2"
     git      = "https://github.com/harfbuzz/harfbuzz.git"
 
     version('2.6.8', sha256='6648a571a27f186e47094121f0095e1b809e918b3037c630c7f38ffad86e3035')
diff --git a/var/spack/repos/builtin/packages/hicolor-icon-theme/package.py b/var/spack/repos/builtin/packages/hicolor-icon-theme/package.py
index 7e898d5bdb..1739cccf4c 100644
--- a/var/spack/repos/builtin/packages/hicolor-icon-theme/package.py
+++ b/var/spack/repos/builtin/packages/hicolor-icon-theme/package.py
@@ -9,7 +9,7 @@ class HicolorIconTheme(AutotoolsPackage):
     icon theme called hicolor."""
 
     homepage = "https://www.freedesktop.org/wiki/Software/icon-theme/"
-    url      = "http://icon-theme.freedesktop.org/releases/hicolor-icon-theme-0.17.tar.xz"
+    url      = "https://icon-theme.freedesktop.org/releases/hicolor-icon-theme-0.17.tar.xz"
 
     version('0.17', sha256='317484352271d18cbbcfac3868eab798d67fff1b8402e740baa6ff41d588a9d8')
 
diff --git a/var/spack/repos/builtin/packages/hpcc/package.py b/var/spack/repos/builtin/packages/hpcc/package.py
index 90cb768058..11b34b8fb1 100644
--- a/var/spack/repos/builtin/packages/hpcc/package.py
+++ b/var/spack/repos/builtin/packages/hpcc/package.py
@@ -34,7 +34,7 @@ class Hpcc(MakefilePackage):
            patterns; based on b_eff (effective bandwidth benchmark)."""
 
     homepage = "https://icl.cs.utk.edu/hpcc"
-    url = "http://icl.cs.utk.edu/projectsfiles/hpcc/download/hpcc-1.5.0.tar.gz"
+    url = "https://icl.cs.utk.edu/projectsfiles/hpcc/download/hpcc-1.5.0.tar.gz"
     git = "https://github.com/icl-utk-edu/hpcc.git"
 
     version('develop', branch='main')
diff --git a/var/spack/repos/builtin/packages/hpccg/package.py b/var/spack/repos/builtin/packages/hpccg/package.py
index d93f79bbcd..2c29fcbae6 100644
--- a/var/spack/repos/builtin/packages/hpccg/package.py
+++ b/var/spack/repos/builtin/packages/hpccg/package.py
@@ -13,7 +13,7 @@ class Hpccg(MakefilePackage):
     """
 
     homepage = "https://mantevo.org/about/applications/"
-    url      = "http://downloads.mantevo.org/releaseTarballs/miniapps/HPCCG/HPCCG-1.0.tar.gz"
+    url      = "https://downloads.mantevo.org/releaseTarballs/miniapps/HPCCG/HPCCG-1.0.tar.gz"
 
     tags = ['proxy-app']
 
diff --git a/var/spack/repos/builtin/packages/hpcg/package.py b/var/spack/repos/builtin/packages/hpcg/package.py
index 49fdaebe27..faf22d712b 100644
--- a/var/spack/repos/builtin/packages/hpcg/package.py
+++ b/var/spack/repos/builtin/packages/hpcg/package.py
@@ -15,7 +15,7 @@ class Hpcg(AutotoolsPackage):
     (PCG) iterations using double precision (64 bit) floating point values."""
 
     homepage = "https://www.hpcg-benchmark.org"
-    url = "http://www.hpcg-benchmark.org/downloads/hpcg-3.1.tar.gz"
+    url = "https://www.hpcg-benchmark.org/downloads/hpcg-3.1.tar.gz"
     git = "https://github.com/hpcg-benchmark/hpcg.git"
 
     version('develop', branch='master')
diff --git a/var/spack/repos/builtin/packages/hpl/package.py b/var/spack/repos/builtin/packages/hpl/package.py
index 30d236fc27..8b7c96ddce 100644
--- a/var/spack/repos/builtin/packages/hpl/package.py
+++ b/var/spack/repos/builtin/packages/hpl/package.py
@@ -16,7 +16,7 @@ class Hpl(AutotoolsPackage):
     implementation of the High Performance Computing Linpack Benchmark."""
 
     homepage = "https://www.netlib.org/benchmark/hpl/"
-    url      = "http://www.netlib.org/benchmark/hpl/hpl-2.2.tar.gz"
+    url      = "https://www.netlib.org/benchmark/hpl/hpl-2.2.tar.gz"
 
     # Note: HPL uses autotools starting with 2.3
 
diff --git a/var/spack/repos/builtin/packages/httpd/package.py b/var/spack/repos/builtin/packages/httpd/package.py
index bdc405ab79..69f909c96f 100644
--- a/var/spack/repos/builtin/packages/httpd/package.py
+++ b/var/spack/repos/builtin/packages/httpd/package.py
@@ -11,7 +11,7 @@ class Httpd(AutotoolsPackage):
     web server."""
 
     homepage = "https://httpd.apache.org/"
-    url      = "http://archive.apache.org/dist/httpd/httpd-2.4.43.tar.bz2"
+    url      = "https://archive.apache.org/dist/httpd/httpd-2.4.43.tar.bz2"
 
     version('2.4.43', sha256='a497652ab3fc81318cdc2a203090a999150d86461acff97c1065dc910fe10f43')
     version('2.4.41', sha256='133d48298fe5315ae9366a0ec66282fa4040efa5d566174481077ade7d18ea40')
diff --git a/var/spack/repos/builtin/packages/hydra/package.py b/var/spack/repos/builtin/packages/hydra/package.py
index 70e540aa73..ed951d2c25 100644
--- a/var/spack/repos/builtin/packages/hydra/package.py
+++ b/var/spack/repos/builtin/packages/hydra/package.py
@@ -13,8 +13,8 @@ class Hydra(AutotoolsPackage):
     management systems (such as slurm, pbs, sge)."""
 
     homepage = "https://www.mpich.org"
-    url      = "http://www.mpich.org/static/downloads/3.2/hydra-3.2.tar.gz"
-    list_url = "http://www.mpich.org/static/downloads/"
+    url      = "https://www.mpich.org/static/downloads/3.2/hydra-3.2.tar.gz"
+    list_url = "https://www.mpich.org/static/downloads/"
     list_depth = 1
 
     version('3.2', sha256='f7a67ec91a773d95cbbd479a80e926d44bee1ff9fc70a8d1df075ea53ea33889')
diff --git a/var/spack/repos/builtin/packages/icedtea/package.py b/var/spack/repos/builtin/packages/icedtea/package.py
index 41f5929439..e2c3726128 100644
--- a/var/spack/repos/builtin/packages/icedtea/package.py
+++ b/var/spack/repos/builtin/packages/icedtea/package.py
@@ -10,12 +10,12 @@ from spack import *
 
 class Icedtea(AutotoolsPackage):
     """The IcedTea project provides a harness to build the source code from
-    http://openjdk.java.net using Free Software build tools and adds a number
+    https://openjdk.java.net/ using Free Software build tools and adds a number
     of key features to the upstream OpenJDK codebase. IcedTea requires an
     existing IcedTea or OpenJDK install to build."""
 
     homepage = "https://openjdk.java.net/projects/icedtea/"
-    url      = "http://icedtea.wildebeest.org/download/source/icedtea-3.4.0.tar.gz"
+    url      = "https://icedtea.wildebeest.org/download/source/icedtea-3.4.0.tar.gz"
 
     version('3.9.0', sha256='84a63bc59f4e101ce8fa183060a59c7e8cbe270945310e90c92b8609a9b8bc88')
     version('3.8.0', sha256='ef1a9110294d0a905833f1db30da0c8a88bd2bde8d92ddb711d72ec763cd25b0')
@@ -75,39 +75,39 @@ class Icedtea(AutotoolsPackage):
 
     resource(name='corba', placement='corba_src',
              sha256='47210b6c69dcc6193b9bf0a3d61b75b48f4fa56e8ca348e40200cfa14eca3fd1',
-             url='http://icedtea.wildebeest.org/download/drops/icedtea8/3.4.0/corba.tar.xz',
+             url='https://icedtea.wildebeest.org/download/drops/icedtea8/3.4.0/corba.tar.xz',
              when='@3.4.0')
     resource(name='hotspot', placement='hotspot_src',
              sha256='973d668f312b869184665def8abe4037dcd78562bf0dda40367102aca647fd76',
-             url='http://icedtea.wildebeest.org/download/drops/icedtea8/3.4.0/hotspot.tar.xz',
+             url='https://icedtea.wildebeest.org/download/drops/icedtea8/3.4.0/hotspot.tar.xz',
              when='@3.4.0')
     resource(name='jaxp', placement='jaxp_src',
              sha256='c74a8a27f1d2dfeaabfce3b5b46623e367fb0fbd5938a3aca8fcd23eb2ce1d53',
-             url='http://icedtea.wildebeest.org/download/drops/icedtea8/3.4.0/jaxp.tar.xz',
+             url='https://icedtea.wildebeest.org/download/drops/icedtea8/3.4.0/jaxp.tar.xz',
              when='@3.4.0')
     resource(name='jaxws', placement='jaxws_src',
              sha256='90642e9131f4c8922576305224278fcae72d8363956b76d4cdbf813027836cac',
-             url='http://icedtea.wildebeest.org/download/drops/icedtea8/3.4.0/jaxws.tar.xz',
+             url='https://icedtea.wildebeest.org/download/drops/icedtea8/3.4.0/jaxws.tar.xz',
              when='@3.4.0')
     resource(name='jdk', placement='jdk_src',
              sha256='ec71e37b98b4baa6831c5cb30bcc1ab18cd95993744dbc4d37a28b2dc5049896',
-             url='http://icedtea.wildebeest.org/download/drops/icedtea8/3.4.0/jdk.tar.xz',
+             url='https://icedtea.wildebeest.org/download/drops/icedtea8/3.4.0/jdk.tar.xz',
              when='@3.4.0')
     resource(name='langtools', placement='langtools_src',
              sha256='489799c6a86fbfb7da2f2c0ec48e44970a152ea38b97bb40cc04bc09155ab39f',
-             url='http://icedtea.wildebeest.org/download/drops/icedtea8/3.4.0/langtools.tar.xz',
+             url='https://icedtea.wildebeest.org/download/drops/icedtea8/3.4.0/langtools.tar.xz',
              when='@3.4.0')
     resource(name='openjdk', placement='openjdk_src',
              sha256='f1eb8c8e45965adcaa1e9cc70df043a825d52409e96712d266167994ff88456d',
-             url='http://icedtea.wildebeest.org/download/drops/icedtea8/3.4.0/openjdk.tar.xz',
+             url='https://icedtea.wildebeest.org/download/drops/icedtea8/3.4.0/openjdk.tar.xz',
              when='@3.4.0')
     resource(name='nashorn', placement='nashorn_src',
              sha256='3f3861e7268a3986fa8d5c940b85a0de1003f7ebb212df157a9b421ac621d6ae',
-             url='http://icedtea.wildebeest.org/download/drops/icedtea8/3.4.0/nashorn.tar.xz',
+             url='https://icedtea.wildebeest.org/download/drops/icedtea8/3.4.0/nashorn.tar.xz',
              when='@3.4.0')
     resource(name='shenandoah', placement='shenandoah_src',
              sha256='61f7cc5896791ae564aa365cb3de80b16426b42f07e5734ebd30c4483fa2fd3a',
-             url='http://icedtea.wildebeest.org/download/drops/icedtea8/3.4.0/shenandoah.tar.xz',
+             url='https://icedtea.wildebeest.org/download/drops/icedtea8/3.4.0/shenandoah.tar.xz',
              when='@3.4.0')
 
     # FIXME:
diff --git a/var/spack/repos/builtin/packages/igvtools/package.py b/var/spack/repos/builtin/packages/igvtools/package.py
index a60257625d..b84395b20d 100644
--- a/var/spack/repos/builtin/packages/igvtools/package.py
+++ b/var/spack/repos/builtin/packages/igvtools/package.py
@@ -13,7 +13,7 @@ class Igvtools(Package):
     files"""
 
     homepage = "https://software.broadinstitute.org/software/igv/home"
-    url      = "http://data.broadinstitute.org/igv/projects/downloads/2.3/igvtools_2.3.98.zip"
+    url      = "https://data.broadinstitute.org/igv/projects/downloads/2.3/igvtools_2.3.98.zip"
 
     version('2.3.98', sha256='07027c179f25960bab9919f255c0f8e08f0861861ac6dc02d92be8313e0316a4')
 
diff --git a/var/spack/repos/builtin/packages/intel-daal/package.py b/var/spack/repos/builtin/packages/intel-daal/package.py
index 4d19772259..df48989c02 100644
--- a/var/spack/repos/builtin/packages/intel-daal/package.py
+++ b/var/spack/repos/builtin/packages/intel-daal/package.py
@@ -12,27 +12,27 @@ class IntelDaal(IntelPackage):
     homepage = "https://software.intel.com/en-us/daal"
 
     version('2020.2.254', sha256='08528bc150dad312ff2ae88ce12d6078ed8ba2f378f4bf3daf0fbbb9657dce1e',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16822/l_daal_2020.2.254.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16822/l_daal_2020.2.254.tgz')
     version('2020.1.217', sha256='3f84dea0ce1038ac1b9c25b3e2c02e9fac440fa36cc8adfce69edfc06fe0edda',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16536/l_daal_2020.1.217.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16536/l_daal_2020.1.217.tgz')
     version('2020.0.166', sha256='695166c9ab32ac5d3006d6d35162db3c98734210507144e315ed7c3b7dbca9c1',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16234/l_daal_2020.0.166.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16234/l_daal_2020.0.166.tgz')
     version('2019.5.281', sha256='e92aaedbe35c9daf1c9483260cb2363da8a85fa1aa5566eb38cf4b1f410bc368',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15818/l_daal_2019.5.281.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15818/l_daal_2019.5.281.tgz')
     version('2019.4.243', sha256='c74486a555ca5636c2ac1b060d5424726c022468f3ee0898bb46e333cda6f7b8',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15552/l_daal_2019.4.243.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15552/l_daal_2019.4.243.tgz')
     version('2019.3.199', sha256='1f7d9cdecc1091b03f1ee6303fc7566179d1e3f1813a98ef7a6239f7d456b8ef',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15277/l_daal_2019.3.199.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15277/l_daal_2019.3.199.tgz')
     version('2019.2.187', sha256='2982886347e9376e892a5c4e22fa1d4b7b843e1ae988a107dd2d0a639f257765',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15097/l_daal_2019.2.187.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15097/l_daal_2019.2.187.tgz')
     version('2019.1.144', sha256='1672afac568c93e185283cf7e044d511381092ebc95d7204c4dccb83cc493197',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/14869/l_daal_2019.1.144.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/14869/l_daal_2019.1.144.tgz')
     version('2019.0.117', sha256='85ac8e983bc9b9cc635e87cb4ec775ffd3695e44275d20fdaf53c19ed280d69f',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13577/l_daal_2019.0.117.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13577/l_daal_2019.0.117.tgz')
     version('2018.3.222', sha256='378fec529a36508dd97529037e1164ff98e0e062a9a47ede99ccf9e91493d1e2',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13007/l_daal_2018.3.222.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13007/l_daal_2018.3.222.tgz')
     version('2018.2.199', sha256='cee30299b3ffaea515f5a9609f4df0f644579c8a1ba2b61747b390f6caf85b14',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12727/l_daal_2018.2.199.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12727/l_daal_2018.2.199.tgz')
     version('2018.1.163', sha256='ac96b5a6c137cda18817d9b3505975863f8f53347225ebb6ccdaaf4bdb8dc349',
             url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12414/l_daal_2018.1.163.tgz')
     version('2018.0.128', sha256='d13a7cd1b6779971f2ba46797447de9409c98a4d2f0eb0dc9622d9d63ac8990f',
@@ -48,8 +48,8 @@ class IntelDaal(IntelPackage):
     version('2017.0.098', sha256='a7064425653b4f5f0fe51e25358d267d8ae023179eece61e08da891b67d79fe5',
             url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/9664/l_daal_2017.0.098.tgz')
     version('2016.3.210', sha256='367eaef21ea0143c11ae3fd56cd2a05315768c059e14caa15894bcf96853687c',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/9099/l_daal_2016.3.210.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/9099/l_daal_2016.3.210.tgz')
     version('2016.2.181', sha256='afdb65768957784d28ac537b4933a86eb4193c68a636157caed17b29ccdbfacb',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/8687/l_daal_2016.2.181.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/8687/l_daal_2016.2.181.tgz')
 
     provides('daal')
diff --git a/var/spack/repos/builtin/packages/intel-ipp/package.py b/var/spack/repos/builtin/packages/intel-ipp/package.py
index 7472bc2e7f..66b0f46dd0 100644
--- a/var/spack/repos/builtin/packages/intel-ipp/package.py
+++ b/var/spack/repos/builtin/packages/intel-ipp/package.py
@@ -12,29 +12,29 @@ class IntelIpp(IntelPackage):
     homepage = "https://software.intel.com/en-us/intel-ipp"
 
     version('2020.2.254', sha256='18266ad1eec9b5b17e76da24f1aa9a9147300e5bd345e6bdad58d7187392fa77',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16846/l_ipp_2020.2.254.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16846/l_ipp_2020.2.254.tgz')
     version('2020.1.217', sha256='0bf8ac7e635e7e602cf201063a1a7dea3779b093104563fdb15e6b7ecf2f00a7',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16534/l_ipp_2020.1.217.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16534/l_ipp_2020.1.217.tgz')
     version('2020.0.166', sha256='6844007892ba524e828f245355cee44e8149f4c233abbbea16f7bb55a7d6ecff',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16233/l_ipp_2020.0.166.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16233/l_ipp_2020.0.166.tgz')
     version('2019.5.281', sha256='61d1e1da1a4a50f1cf02a3ed44e87eed05e94d58b64ef1e67a3bdec363bee713',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15817/l_ipp_2019.5.281.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15817/l_ipp_2019.5.281.tgz')
     version('2019.4.243', sha256='d4f4232323e66b010d8440c75189aeb6a3249966e05035242b21982238a7a7f2',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15541/l_ipp_2019.4.243.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15541/l_ipp_2019.4.243.tgz')
     version('2019.3.199', sha256='02545383206c1ae4dd66bfa6a38e2e14480ba11932eeed632df8ab798aa15ccd',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15276/l_ipp_2019.3.199.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15276/l_ipp_2019.3.199.tgz')
     version('2019.2.187', sha256='280e9081278a0db3892fe82474c1201ec780a6f7c8d1f896494867f4b3bd8421',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15096/l_ipp_2019.2.187.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15096/l_ipp_2019.2.187.tgz')
     version('2019.1.144', sha256='1eb7cd0fba74615aeafa4e314c645414497eb73f1705200c524fe78f00620db3',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/14887/l_ipp_2019.1.144.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/14887/l_ipp_2019.1.144.tgz')
     version('2019.0.117', sha256='d552ba49fba58f0e94da2048176f21c5dfd490dca7c5ce666dfc2d18db7fd551',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13576/l_ipp_2019.0.117.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13576/l_ipp_2019.0.117.tgz')
     version('2018.4.274', sha256='bdc6082c65410c98ccf6daf239e0a6625d15ec5e0ddc1c0563aad42b6ba9063c',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13726/l_ipp_2018.4.274.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13726/l_ipp_2018.4.274.tgz')
     version('2018.3.222', sha256='bb783c5e6220e240f19136ae598cd1c1d647496495139ce680de58d3d5496934',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13006/l_ipp_2018.3.222.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13006/l_ipp_2018.3.222.tgz')
     version('2018.2.199', sha256='55cb5c910b2c1e2bd798163fb5019b992b1259a0692e328bb9054778cf01562b',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12726/l_ipp_2018.2.199.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12726/l_ipp_2018.2.199.tgz')
     version('2018.0.128', sha256='da568ceec1b7acbcc8f666b73d4092788b037b1b03c0436974b82155056ed166',
             url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12071/l_ipp_2018.0.128.tgz')
     version('2017.3.196', sha256='50d49a1000a88a8a58bd610466e90ae28d07a70993a78cbbf85d44d27c4232b6',
@@ -47,6 +47,6 @@ class IntelIpp(IntelPackage):
             url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/9663/l_ipp_2017.0.098.tgz')
     # built from parallel_studio_xe_2016.3.067
     version('9.0.3.210', sha256='8ce7bf17f4a0bbf8c441063de26be7f6e0f6179789e23f24eaa8b712632b3cdd',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/9067/l_ipp_9.0.3.210.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/9067/l_ipp_9.0.3.210.tgz')
 
     provides('ipp')
diff --git a/var/spack/repos/builtin/packages/intel-mkl/package.py b/var/spack/repos/builtin/packages/intel-mkl/package.py
index 5e89f1a91b..d7050b03b7 100644
--- a/var/spack/repos/builtin/packages/intel-mkl/package.py
+++ b/var/spack/repos/builtin/packages/intel-mkl/package.py
@@ -14,33 +14,33 @@ class IntelMkl(IntelPackage):
     homepage = "https://software.intel.com/en-us/intel-mkl"
 
     version('2020.4.304', sha256='2314d46536974dbd08f2a4e4f9e9a155dc7e79e2798c74e7ddfaad00a5917ea5',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16917/l_mkl_2020.4.304.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16917/l_mkl_2020.4.304.tgz')
     version('2020.3.279', sha256='2b8e434ecc9462491130ba25a053927fd1a2eca05e12acb5936b08c486857a04',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16903/l_mkl_2020.3.279.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16903/l_mkl_2020.3.279.tgz')
     version('2020.2.254', sha256='ed00a267af362a6c14212bd259ab1673d64337e077263033edeef8ac72c10223',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16849/l_mkl_2020.2.254.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16849/l_mkl_2020.2.254.tgz')
     version('2020.1.217', sha256='082a4be30bf4f6998e4d6e3da815a77560a5e66a68e254d161ab96f07086066d',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16533/l_mkl_2020.1.217.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16533/l_mkl_2020.1.217.tgz')
     version('2020.0.166', sha256='f6d92deb3ff10b11ba3df26b2c62bb4f0f7ae43e21905a91d553e58f0f5a8ae0',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16232/l_mkl_2020.0.166.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16232/l_mkl_2020.0.166.tgz')
     version('2019.5.281', sha256='9995ea4469b05360d509c9705e9309dc983c0a10edc2ae3a5384bc837326737e',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15816/l_mkl_2019.5.281.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15816/l_mkl_2019.5.281.tgz')
     version('2019.4.243', sha256='fcac7b0369665d93f0c4dd98afe2816aeba5410e2b760655fe55fc477f8f33d0',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15540/l_mkl_2019.4.243.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15540/l_mkl_2019.4.243.tgz')
     version('2019.3.199', sha256='06de2b54f4812e7c39a118536259c942029fe1d6d8918ad9df558a83c4162b8f',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15275/l_mkl_2019.3.199.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15275/l_mkl_2019.3.199.tgz')
     version('2019.2.187', sha256='2bf004e6b5adb4f956993d6c20ea6ce289bb630314dd501db7f2dd5b9978ed1d',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15095/l_mkl_2019.2.187.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15095/l_mkl_2019.2.187.tgz')
     version('2019.1.144', sha256='5205a460a9c685f7a442868367389b2d0c25e1455346bc6a37c5b8ff90a20fbb',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/14895/l_mkl_2019.1.144.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/14895/l_mkl_2019.1.144.tgz')
     version('2019.0.117', sha256='4e1fe2c705cfc47050064c0d6c4dee1a8c6740ac1c4f64dde9c7511c4989c7ad',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13575/l_mkl_2019.0.117.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13575/l_mkl_2019.0.117.tgz')
     version('2018.4.274', sha256='18eb3cde3e6a61a88f25afff25df762a560013f650aaf363f7d3d516a0d04881',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13725/l_mkl_2018.4.274.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13725/l_mkl_2018.4.274.tgz')
     version('2018.3.222', sha256='108d59c0927e58ce8c314db6c2b48ee331c3798f7102725f425d6884eb6ed241',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13005/l_mkl_2018.3.222.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13005/l_mkl_2018.3.222.tgz')
     version('2018.2.199', sha256='e28d12173bef9e615b0ded2f95f59a42b3e9ad0afa713a79f8801da2bfb31936',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12725/l_mkl_2018.2.199.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12725/l_mkl_2018.2.199.tgz')
     version('2018.1.163', sha256='f6dc263fc6f3c350979740a13de1b1e8745d9ba0d0f067ece503483b9189c2ca',
             url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12414/l_mkl_2018.1.163.tgz')
     version('2018.0.128', sha256='c368baa40ca88057292512534d7fad59fa24aef06da038ea0248e7cd1e280cec',
@@ -57,10 +57,10 @@ class IntelMkl(IntelPackage):
             url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/9662/l_mkl_2017.0.098.tgz')
     # built from parallel_studio_xe_2016.3.x
     version('11.3.3.210', sha256='ff858f0951fd698e9fb30147ea25a8a810c57f0126c8457b3b0cdf625ea43372',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/9068/l_mkl_11.3.3.210.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/9068/l_mkl_11.3.3.210.tgz')
     # built from parallel_studio_xe_2016.2.062
     version('11.3.2.181', sha256='bac04a07a1fe2ae4996a67d1439ee90c54f31305e8663d1ccfce043bed84fc27',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/8711/l_mkl_11.3.2.181.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/8711/l_mkl_11.3.2.181.tgz')
 
     depends_on('cpio', type='build')
 
diff --git a/var/spack/repos/builtin/packages/intel-mpi/package.py b/var/spack/repos/builtin/packages/intel-mpi/package.py
index d5b2c51d7e..e8e20af1cb 100644
--- a/var/spack/repos/builtin/packages/intel-mpi/package.py
+++ b/var/spack/repos/builtin/packages/intel-mpi/package.py
@@ -12,33 +12,33 @@ class IntelMpi(IntelPackage):
     homepage = "https://software.intel.com/en-us/intel-mpi-library"
 
     version('2019.10.317', sha256='28e1b615e63d2170a99feedc75e3b0c5a7e1a07dcdaf0a4181831b07817a5346',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/17534/l_mpi_2019.10.317.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/17534/l_mpi_2019.10.317.tgz')
     version('2019.9.304', sha256='618a5dc2de54306645e6428c5eb7d267b54b11b5a83dfbcad7d0f9e0d90bb2e7',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/17263/l_mpi_2019.9.304.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/17263/l_mpi_2019.9.304.tgz')
     version('2019.8.254', sha256='fa163b4b79bd1b7509980c3e7ad81b354fc281a92f9cf2469bf4d323899567c0',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16814/l_mpi_2019.8.254.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16814/l_mpi_2019.8.254.tgz')
     version('2019.7.217', sha256='90383b0023f84ac003a55d8bb29dbcf0c639f43a25a2d8d8698a16e770ac9c07',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16546/l_mpi_2019.7.217.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16546/l_mpi_2019.7.217.tgz')
     version('2019.6.166', sha256='119be69f1117c93a9e5e9b8b4643918e55d2a55a78ad9567f77d16cdaf18cd6e',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16120/l_mpi_2019.6.166.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16120/l_mpi_2019.6.166.tgz')
     version('2019.5.281', sha256='9c59da051f1325b221e5bc4d8b689152e85d019f143069fa39e17989306811f4',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15838/l_mpi_2019.5.281.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15838/l_mpi_2019.5.281.tgz')
     version('2019.4.243', sha256='233a8660b92ecffd89fedd09f408da6ee140f97338c293146c9c080a154c5fcd',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15553/l_mpi_2019.4.243.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15553/l_mpi_2019.4.243.tgz')
     version('2019.3.199', sha256='5304346c863f64de797250eeb14f51c5cfc8212ff20813b124f20e7666286990',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15260/l_mpi_2019.3.199.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15260/l_mpi_2019.3.199.tgz')
     version('2019.2.187', sha256='6a3305933b5ef9e3f7de969e394c91620f3fa4bb815a4f439577739d04778b20',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15040/l_mpi_2019.2.187.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15040/l_mpi_2019.2.187.tgz')
     version('2019.1.144', sha256='dac86a5db6b86503313742b17535856a432955604f7103cb4549a9bfc256c3cd',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/14879/l_mpi_2019.1.144.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/14879/l_mpi_2019.1.144.tgz')
     version('2019.0.117', sha256='dfb403f49c1af61b337aa952b71289c7548c3a79c32c57865eab0ea0f0e1bc08',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13584/l_mpi_2019.0.117.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13584/l_mpi_2019.0.117.tgz')
     version('2018.4.274', sha256='a1114b3eb4149c2f108964b83cad02150d619e50032059d119ac4ffc9d5dd8e0',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13741/l_mpi_2018.4.274.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13741/l_mpi_2018.4.274.tgz')
     version('2018.3.222', sha256='5021d14b344fc794e89f146e4d53d70184d7048610895d7a6a1e8ac0cf258999',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13112/l_mpi_2018.3.222.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13112/l_mpi_2018.3.222.tgz')
     version('2018.2.199', sha256='0927f1bff90d10974433ba2892e3fd38e6fee5232ab056a9f9decf565e814460',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12748/l_mpi_2018.2.199.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12748/l_mpi_2018.2.199.tgz')
     version('2018.1.163', sha256='130b11571c3f71af00a722fa8641db5a1552ac343d770a8304216d8f5d00e75c',
             url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12414/l_mpi_2018.1.163.tgz')
     version('2018.0.128', sha256='debaf2cf80df06db9633dfab6aa82213b84a665a55ee2b0178403906b5090209',
@@ -53,7 +53,7 @@ class IntelMpi(IntelPackage):
             url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/11014/l_mpi_2017.1.132.tgz')
     # built from parallel_studio_xe_2016.3.068
     version('5.1.3.223',  sha256='544f4173b09609beba711fa3ba35567397ff3b8390e4f870a3307f819117dd9b',
-            url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/9278/l_mpi_p_5.1.3.223.tgz')
+            url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/9278/l_mpi_p_5.1.3.223.tgz')
 
     provides('mpi')
 
diff --git a/var/spack/repos/builtin/packages/intel-parallel-studio/package.py b/var/spack/repos/builtin/packages/intel-parallel-studio/package.py
index 9a1c68ba6a..98415daac6 100644
--- a/var/spack/repos/builtin/packages/intel-parallel-studio/package.py
+++ b/var/spack/repos/builtin/packages/intel-parallel-studio/package.py
@@ -22,26 +22,26 @@ class IntelParallelStudio(IntelPackage):
     # in the 'intel' package.
 
     # Cluster Edition (top tier; all components included)
-    version('cluster.2020.4',      sha256='f36e49da97b6ce24d2d464d73d7ff49d71cff20e1698c20e607919819602a9f5', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/17113/parallel_studio_xe_2020_update4_cluster_edition.tgz')
-    version('cluster.2020.2',      sha256='4795c44374e8988b91da20ac8f13022d7d773461def4a26ca210a8694f69f133', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16744/parallel_studio_xe_2020_update2_cluster_edition.tgz')
-    version('cluster.2020.1',      sha256='fd11d8de72b2bd60474f8bce7b463e4cbb2255969b9eaf24f689575aa2a2abab', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16526/parallel_studio_xe_2020_update1_cluster_edition.tgz')
-    version('cluster.2020.0',      sha256='573b1d20707d68ce85b70934cfad15b5ad9cc14124a261c17ddd7717ba842c64', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16225/parallel_studio_xe_2020_cluster_edition.tgz')
-    #
-    version('cluster.2019.5',      sha256='c03421de616bd4e640ed25ce4103ec9c5c85768a940a5cb5bd1e97b45be33904', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15809/parallel_studio_xe_2019_update5_cluster_edition.tgz')
-    version('cluster.2019.4',      sha256='32aee12de3b5ca14caf7578313c06b205795c67620f4a9606ea45696ee3b3d9e', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15533/parallel_studio_xe_2019_update4_cluster_edition.tgz')
-    version('cluster.2019.3',      sha256='b5b022366d6d1a98dbb63b60221c62bc951c9819653ad6f5142192e89f78cf63', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15268/parallel_studio_xe_2019_update3_cluster_edition.tgz')
-    version('cluster.2019.2',      sha256='8c526bdd95d1da454e5cada00f7a2353089b86d0c9df2088ca7f842fe3ff4cae', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15088/parallel_studio_xe_2019_update2_cluster_edition.tgz')
-    version('cluster.2019.1',      sha256='3a1eb39f15615f7a2688426b9835e5e841e0c030f21dcfc899fe23e09bd2c645', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/14850/parallel_studio_xe_2019_update1_cluster_edition.tgz')
-    version('cluster.2019.0',      sha256='1096dd4139bdd4b3abbda69a17d1e229a606759f793f5b0ba0d39623928ee4a1', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13589/parallel_studio_xe_2019_cluster_edition.tgz')
-    #
-    version('cluster.2018.4',      sha256='210a5904a860e11b861720e68416f91fd47a459e4500976853291fa8b0478566', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13717/parallel_studio_xe_2018_update4_cluster_edition.tgz')
-    version('cluster.2018.3',      sha256='23c64b88cea5056eaeef7b4ae0f4c6a86485c97f5e41d6c8419cb00aa4929287', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12998/parallel_studio_xe_2018_update3_cluster_edition.tgz')
-    version('cluster.2018.2',      sha256='550bc4758f7dd70e75830d329947532ad8b7cbb85225b8ec6db7e78a3f1d6d84', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12717/parallel_studio_xe_2018_update2_cluster_edition.tgz')
+    version('cluster.2020.4',      sha256='f36e49da97b6ce24d2d464d73d7ff49d71cff20e1698c20e607919819602a9f5', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/17113/parallel_studio_xe_2020_update4_cluster_edition.tgz')
+    version('cluster.2020.2',      sha256='4795c44374e8988b91da20ac8f13022d7d773461def4a26ca210a8694f69f133', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16744/parallel_studio_xe_2020_update2_cluster_edition.tgz')
+    version('cluster.2020.1',      sha256='fd11d8de72b2bd60474f8bce7b463e4cbb2255969b9eaf24f689575aa2a2abab', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16526/parallel_studio_xe_2020_update1_cluster_edition.tgz')
+    version('cluster.2020.0',      sha256='573b1d20707d68ce85b70934cfad15b5ad9cc14124a261c17ddd7717ba842c64', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16225/parallel_studio_xe_2020_cluster_edition.tgz')
+    #
+    version('cluster.2019.5',      sha256='c03421de616bd4e640ed25ce4103ec9c5c85768a940a5cb5bd1e97b45be33904', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15809/parallel_studio_xe_2019_update5_cluster_edition.tgz')
+    version('cluster.2019.4',      sha256='32aee12de3b5ca14caf7578313c06b205795c67620f4a9606ea45696ee3b3d9e', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15533/parallel_studio_xe_2019_update4_cluster_edition.tgz')
+    version('cluster.2019.3',      sha256='b5b022366d6d1a98dbb63b60221c62bc951c9819653ad6f5142192e89f78cf63', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15268/parallel_studio_xe_2019_update3_cluster_edition.tgz')
+    version('cluster.2019.2',      sha256='8c526bdd95d1da454e5cada00f7a2353089b86d0c9df2088ca7f842fe3ff4cae', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15088/parallel_studio_xe_2019_update2_cluster_edition.tgz')
+    version('cluster.2019.1',      sha256='3a1eb39f15615f7a2688426b9835e5e841e0c030f21dcfc899fe23e09bd2c645', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/14850/parallel_studio_xe_2019_update1_cluster_edition.tgz')
+    version('cluster.2019.0',      sha256='1096dd4139bdd4b3abbda69a17d1e229a606759f793f5b0ba0d39623928ee4a1', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13589/parallel_studio_xe_2019_cluster_edition.tgz')
+    #
+    version('cluster.2018.4',      sha256='210a5904a860e11b861720e68416f91fd47a459e4500976853291fa8b0478566', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13717/parallel_studio_xe_2018_update4_cluster_edition.tgz')
+    version('cluster.2018.3',      sha256='23c64b88cea5056eaeef7b4ae0f4c6a86485c97f5e41d6c8419cb00aa4929287', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12998/parallel_studio_xe_2018_update3_cluster_edition.tgz')
+    version('cluster.2018.2',      sha256='550bc4758f7dd70e75830d329947532ad8b7cbb85225b8ec6db7e78a3f1d6d84', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12717/parallel_studio_xe_2018_update2_cluster_edition.tgz')
     version('cluster.2018.1',      sha256='f7a94e83248d2641eb7ae2c1abf681067203a5b4372619e039861b468744774c', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12374/parallel_studio_xe_2018_update1_cluster_edition.tgz')
     version('cluster.2018.0',      sha256='526e5e71c420dc9b557b0bae2a81abb33eedb9b6a28ac94996ccbcf71cf53774', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12058/parallel_studio_xe_2018_cluster_edition.tgz')
     #
-    version('cluster.2017.7',      sha256='133c3aa99841a4fe48149938a90f971467452a82f033be10cd9464ba810f6360', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12856/parallel_studio_xe_2017_update7.tgz')
-    version('cluster.2017.6',      sha256='d771b00d3658934c424f294170125dc58ae9b03639aa898a2f115d7a7482dd3a', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12534/parallel_studio_xe_2017_update6.tgz')
+    version('cluster.2017.7',      sha256='133c3aa99841a4fe48149938a90f971467452a82f033be10cd9464ba810f6360', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12856/parallel_studio_xe_2017_update7.tgz')
+    version('cluster.2017.6',      sha256='d771b00d3658934c424f294170125dc58ae9b03639aa898a2f115d7a7482dd3a', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12534/parallel_studio_xe_2017_update6.tgz')
     version('cluster.2017.5',      sha256='36e496d1d1d7d7168cc3ba8f5bca9b52022339f30b62a87ed064b77a5cbccc09', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12138/parallel_studio_xe_2017_update5.tgz')
     version('cluster.2017.4',      sha256='27d34625adfc635d767c136b5417a372f322fabe6701b651d858a8fe06d07f2d', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/11537/parallel_studio_xe_2017_update4.tgz')
     version('cluster.2017.3',      sha256='856950c0493de3e8b4150e18f8821675c1cf75c2eea5ff0804f59eb301414bbe', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/11460/parallel_studio_xe_2017_update3.tgz')
@@ -63,26 +63,26 @@ class IntelParallelStudio(IntelPackage):
     # NB: Pre-2018 download packages for Professional are the same as for
     # Cluster; differences manifest only in the tokens present in the license
     # file delivered as part of the purchase.
-    version('professional.2020.4', sha256='f9679a40c63575191385837f4f1bdafbcfd3736f09ac51d0761248b9ca9cc9e6', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/17114/parallel_studio_xe_2020_update4_professional_edition.tgz')
-    version('professional.2020.2', sha256='96f9bca551a43e09d9648e8cba357739a759423adb671d1aa5973b7a930370c5', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16756/parallel_studio_xe_2020_update2_professional_edition.tgz')
-    version('professional.2020.1', sha256='5b547be92ecf50cb338b3038a565f5609135b27aa98a8b7964879eb2331eb29a', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16527/parallel_studio_xe_2020_update1_professional_edition.tgz')
-    version('professional.2020.0', sha256='e88cad18d28da50ed9cb87b12adccf13efd91bf94731dc33290481306c6f15ac', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16226/parallel_studio_xe_2020_professional_edition.tgz')
-    #
-    version('professional.2019.5', sha256='0ec638330214539361f8632e20759f385a5a78013dcc980ee93743d86d354452', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15810/parallel_studio_xe_2019_update5_professional_edition.tgz')
-    version('professional.2019.4', sha256='9b2818ea5739ade100841e99ce79ef7f4049a2513beb2ce20fc94706f1ba0231', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15534/parallel_studio_xe_2019_update4_professional_edition.tgz')
-    version('professional.2019.3', sha256='92a8879106d0bdf1ecf4670cd97fbcdc67d78b13bdf484f2c516a533aa7a27f9', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15269/parallel_studio_xe_2019_update3_professional_edition.tgz')
-    version('professional.2019.2', sha256='cdb629d74612d135ca197f1f64e6a081e31df68cda92346a29e1223bb06e64ea', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15089/parallel_studio_xe_2019_update2_professional_edition.tgz')
+    version('professional.2020.4', sha256='f9679a40c63575191385837f4f1bdafbcfd3736f09ac51d0761248b9ca9cc9e6', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/17114/parallel_studio_xe_2020_update4_professional_edition.tgz')
+    version('professional.2020.2', sha256='96f9bca551a43e09d9648e8cba357739a759423adb671d1aa5973b7a930370c5', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16756/parallel_studio_xe_2020_update2_professional_edition.tgz')
+    version('professional.2020.1', sha256='5b547be92ecf50cb338b3038a565f5609135b27aa98a8b7964879eb2331eb29a', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16527/parallel_studio_xe_2020_update1_professional_edition.tgz')
+    version('professional.2020.0', sha256='e88cad18d28da50ed9cb87b12adccf13efd91bf94731dc33290481306c6f15ac', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16226/parallel_studio_xe_2020_professional_edition.tgz')
+    #
+    version('professional.2019.5', sha256='0ec638330214539361f8632e20759f385a5a78013dcc980ee93743d86d354452', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15810/parallel_studio_xe_2019_update5_professional_edition.tgz')
+    version('professional.2019.4', sha256='9b2818ea5739ade100841e99ce79ef7f4049a2513beb2ce20fc94706f1ba0231', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15534/parallel_studio_xe_2019_update4_professional_edition.tgz')
+    version('professional.2019.3', sha256='92a8879106d0bdf1ecf4670cd97fbcdc67d78b13bdf484f2c516a533aa7a27f9', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15269/parallel_studio_xe_2019_update3_professional_edition.tgz')
+    version('professional.2019.2', sha256='cdb629d74612d135ca197f1f64e6a081e31df68cda92346a29e1223bb06e64ea', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15089/parallel_studio_xe_2019_update2_professional_edition.tgz')
     version('professional.2019.1', sha256='bc83ef5a728903359ae11a2b90ad7dae4ae61194afb28bb5bb419f6a6aea225d', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/14825/parallel_studio_xe_2019_update1_professional_edition.tgz')
-    version('professional.2019.0', sha256='94b9714e353e5c4f58d38cb236e2f8911cbef31c4b42a148d60c988e926411e2', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13578/parallel_studio_xe_2019_professional_edition.tgz')
+    version('professional.2019.0', sha256='94b9714e353e5c4f58d38cb236e2f8911cbef31c4b42a148d60c988e926411e2', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13578/parallel_studio_xe_2019_professional_edition.tgz')
     #
-    version('professional.2018.4', sha256='54ab4320da849108602096fa7a34aa21751068467e0d1584aa8f16352b77d323', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13718/parallel_studio_xe_2018_update4_professional_edition.tgz')
-    version('professional.2018.3', sha256='3d8e72ccad31f243e43b72a925ad4a6908e2955682433898640ab783decf9960', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12999/parallel_studio_xe_2018_update3_professional_edition.tgz')
-    version('professional.2018.2', sha256='fc577b29fb2c687441d4faea14a6fb6da529fc78fcb778cbface59f40e128e02', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12718/parallel_studio_xe_2018_update2_professional_edition.tgz')
+    version('professional.2018.4', sha256='54ab4320da849108602096fa7a34aa21751068467e0d1584aa8f16352b77d323', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13718/parallel_studio_xe_2018_update4_professional_edition.tgz')
+    version('professional.2018.3', sha256='3d8e72ccad31f243e43b72a925ad4a6908e2955682433898640ab783decf9960', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12999/parallel_studio_xe_2018_update3_professional_edition.tgz')
+    version('professional.2018.2', sha256='fc577b29fb2c687441d4faea14a6fb6da529fc78fcb778cbface59f40e128e02', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12718/parallel_studio_xe_2018_update2_professional_edition.tgz')
     version('professional.2018.1', sha256='dd3e118069d87eebb614336732323b48172c8c8a653cde673a8ef02f7358e94d', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12375/parallel_studio_xe_2018_update1_professional_edition.tgz')
     version('professional.2018.0', sha256='72308ffa088391ea65726a79d7a73738206fbb1d8ed8563e3d06eab3120fb1a0', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12062/parallel_studio_xe_2018_professional_edition.tgz')
     #
-    version('professional.2017.7', sha256='133c3aa99841a4fe48149938a90f971467452a82f033be10cd9464ba810f6360', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12856/parallel_studio_xe_2017_update7.tgz')
-    version('professional.2017.6', sha256='d771b00d3658934c424f294170125dc58ae9b03639aa898a2f115d7a7482dd3a', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12534/parallel_studio_xe_2017_update6.tgz')
+    version('professional.2017.7', sha256='133c3aa99841a4fe48149938a90f971467452a82f033be10cd9464ba810f6360', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12856/parallel_studio_xe_2017_update7.tgz')
+    version('professional.2017.6', sha256='d771b00d3658934c424f294170125dc58ae9b03639aa898a2f115d7a7482dd3a', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12534/parallel_studio_xe_2017_update6.tgz')
     version('professional.2017.5', sha256='36e496d1d1d7d7168cc3ba8f5bca9b52022339f30b62a87ed064b77a5cbccc09', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12138/parallel_studio_xe_2017_update5.tgz')
     version('professional.2017.4', sha256='27d34625adfc635d767c136b5417a372f322fabe6701b651d858a8fe06d07f2d', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/11537/parallel_studio_xe_2017_update4.tgz')
     version('professional.2017.3', sha256='856950c0493de3e8b4150e18f8821675c1cf75c2eea5ff0804f59eb301414bbe', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/11460/parallel_studio_xe_2017_update3.tgz')
@@ -100,26 +100,26 @@ class IntelParallelStudio(IntelPackage):
     version('professional.2015.1', sha256='84fdf48d1de20e1d580ba5d419a5bc1c55d217a4f5dc1807190ecffe0229a62b', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/4992/parallel_studio_xe_2015_update1.tgz')
 
     # Composer Edition (basic tier; excluded: MPI/..., Advisor/Inspector/Vtune)
-    version('composer.2020.4',     sha256='ac1efeff608a8c3a416e6dfe20364061e8abf62d35fbaacdffe3fc9676fc1aa3', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16759/parallel_studio_xe_2020_update2_composer_edition.tgz')
-    version('composer.2020.2',     sha256='42af16e9a91226978bb401d9f17b628bc279aa8cb104d4a38ba0808234a79bdd', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16759/parallel_studio_xe_2020_update2_composer_edition.tgz')
-    version('composer.2020.1',     sha256='26c7e7da87b8a83adfd408b2a354d872be97736abed837364c1bf10f4469b01e', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16530/parallel_studio_xe_2020_update1_composer_edition.tgz')
-    version('composer.2020.0',     sha256='9168045466139b8e280f50f0606b9930ffc720bbc60bc76f5576829ac15757ae', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16229/parallel_studio_xe_2020_composer_edition.tgz')
-    #
-    version('composer.2019.5',     sha256='e8c8e4b9b46826a02c49325c370c79f896858611bf33ddb7fb204614838ad56c', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15813/parallel_studio_xe_2019_update5_composer_edition.tgz')
-    version('composer.2019.4',     sha256='1915993445323e1e78d6de73702a88fa3df2036109cde03d74ee38fef9f1abf2', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15537/parallel_studio_xe_2019_update4_composer_edition.tgz')
-    version('composer.2019.3',     sha256='15373ac6df2a84e6dd9fa0eac8b5f07ab00cdbb67f494161fd0d4df7a71aff8e', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15272/parallel_studio_xe_2019_update3_composer_edition.tgz')
-    version('composer.2019.2',     sha256='1e0f400be1f458592a8c2e7d55c1b2a4506f68f22bacbf1175af947809a4cd87', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15092/parallel_studio_xe_2019_update2_composer_edition.tgz')
+    version('composer.2020.4',     sha256='ac1efeff608a8c3a416e6dfe20364061e8abf62d35fbaacdffe3fc9676fc1aa3', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16759/parallel_studio_xe_2020_update2_composer_edition.tgz')
+    version('composer.2020.2',     sha256='42af16e9a91226978bb401d9f17b628bc279aa8cb104d4a38ba0808234a79bdd', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16759/parallel_studio_xe_2020_update2_composer_edition.tgz')
+    version('composer.2020.1',     sha256='26c7e7da87b8a83adfd408b2a354d872be97736abed837364c1bf10f4469b01e', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16530/parallel_studio_xe_2020_update1_composer_edition.tgz')
+    version('composer.2020.0',     sha256='9168045466139b8e280f50f0606b9930ffc720bbc60bc76f5576829ac15757ae', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16229/parallel_studio_xe_2020_composer_edition.tgz')
+    #
+    version('composer.2019.5',     sha256='e8c8e4b9b46826a02c49325c370c79f896858611bf33ddb7fb204614838ad56c', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15813/parallel_studio_xe_2019_update5_composer_edition.tgz')
+    version('composer.2019.4',     sha256='1915993445323e1e78d6de73702a88fa3df2036109cde03d74ee38fef9f1abf2', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15537/parallel_studio_xe_2019_update4_composer_edition.tgz')
+    version('composer.2019.3',     sha256='15373ac6df2a84e6dd9fa0eac8b5f07ab00cdbb67f494161fd0d4df7a71aff8e', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15272/parallel_studio_xe_2019_update3_composer_edition.tgz')
+    version('composer.2019.2',     sha256='1e0f400be1f458592a8c2e7d55c1b2a4506f68f22bacbf1175af947809a4cd87', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15092/parallel_studio_xe_2019_update2_composer_edition.tgz')
     version('composer.2019.1',     sha256='db000cb2ebf411f6e91719db68a0c68b8d3f7d38ad7f2049ea5b2f1b5f006c25', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/14832/parallel_studio_xe_2019_update1_composer_edition.tgz')
-    version('composer.2019.0',     sha256='e1a29463038b063e01f694e2817c0fcf1a8e824e24f15a26ce85f20afa3f963a', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13581/parallel_studio_xe_2019_composer_edition.tgz')
+    version('composer.2019.0',     sha256='e1a29463038b063e01f694e2817c0fcf1a8e824e24f15a26ce85f20afa3f963a', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13581/parallel_studio_xe_2019_composer_edition.tgz')
     #
-    version('composer.2018.4',     sha256='94aca8f091dff9535b02f022a37aef150b36925c8ef069335621496f8e4db267', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13722/parallel_studio_xe_2018_update4_composer_edition.tgz')
-    version('composer.2018.3',     sha256='f21f7759709a3d3e3390a8325fa89ac79b1fce8890c292e73b2ba3ec576ebd2b', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13002/parallel_studio_xe_2018_update3_composer_edition.tgz')
-    version('composer.2018.2',     sha256='02d2a9fb10d9810f85dd77700215c4348d2e4475e814e4f086eb1442462667ff', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12722/parallel_studio_xe_2018_update2_composer_edition.tgz')
+    version('composer.2018.4',     sha256='94aca8f091dff9535b02f022a37aef150b36925c8ef069335621496f8e4db267', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13722/parallel_studio_xe_2018_update4_composer_edition.tgz')
+    version('composer.2018.3',     sha256='f21f7759709a3d3e3390a8325fa89ac79b1fce8890c292e73b2ba3ec576ebd2b', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13002/parallel_studio_xe_2018_update3_composer_edition.tgz')
+    version('composer.2018.2',     sha256='02d2a9fb10d9810f85dd77700215c4348d2e4475e814e4f086eb1442462667ff', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12722/parallel_studio_xe_2018_update2_composer_edition.tgz')
     version('composer.2018.1',     sha256='db9aa417da185a03a63330c9d76ee8e88496ae6b771584d19003a29eedc7cab5', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12381/parallel_studio_xe_2018_update1_composer_edition.tgz')
     version('composer.2018.0',     sha256='ecad64360fdaff2548a0ea250a396faf680077c5a83c3c3ce2c55f4f4270b904', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12067/parallel_studio_xe_2018_composer_edition.tgz')
     #
-    version('composer.2017.7',     sha256='661e33b68e47bf335694d2255f5883955234e9085c8349783a5794eed2a937ad', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12860/parallel_studio_xe_2017_update7_composer_edition.tgz')
-    version('composer.2017.6',     sha256='771f50746fe130ea472394c42e25d2c7edae049ad809d2050945ef637becf65f', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12538/parallel_studio_xe_2017_update6_composer_edition.tgz')
+    version('composer.2017.7',     sha256='661e33b68e47bf335694d2255f5883955234e9085c8349783a5794eed2a937ad', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12860/parallel_studio_xe_2017_update7_composer_edition.tgz')
+    version('composer.2017.6',     sha256='771f50746fe130ea472394c42e25d2c7edae049ad809d2050945ef637becf65f', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12538/parallel_studio_xe_2017_update6_composer_edition.tgz')
     version('composer.2017.5',     sha256='ede4ea9351fcf263103588ae0f130b4c2a79395529cdb698b0d6e866c4871f78', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12144/parallel_studio_xe_2017_update5_composer_edition.tgz')
     version('composer.2017.4',     sha256='4304766f80206a27709be61641c16782fccf2b3fcf7285782cce921ddc9b10ff', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/11541/parallel_studio_xe_2017_update4_composer_edition.tgz')
     version('composer.2017.3',     sha256='3648578d7bba993ebb1da37c173979bfcfb47f26e7f4e17f257e78dea8fd96ab', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/11464/parallel_studio_xe_2017_update3_composer_edition.tgz')
diff --git a/var/spack/repos/builtin/packages/intel/package.py b/var/spack/repos/builtin/packages/intel/package.py
index bd118c1b38..c49d2d8a2d 100644
--- a/var/spack/repos/builtin/packages/intel/package.py
+++ b/var/spack/repos/builtin/packages/intel/package.py
@@ -16,29 +16,29 @@ class Intel(IntelPackage):
 
     # Same as in ../intel-parallel-studio/package.py, Composer Edition,
     # but the version numbering in Spack differs.
-    version('20.0.4',              sha256='ac1efeff608a8c3a416e6dfe20364061e8abf62d35fbaacdffe3fc9676fc1aa3', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/17117/parallel_studio_xe_2020_update4_composer_edition.tgz')
-    version('20.0.2',              sha256='42af16e9a91226978bb401d9f17b628bc279aa8cb104d4a38ba0808234a79bdd', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16759/parallel_studio_xe_2020_update2_composer_edition.tgz')
-    version('20.0.1',              sha256='26c7e7da87b8a83adfd408b2a354d872be97736abed837364c1bf10f4469b01e', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16530/parallel_studio_xe_2020_update1_composer_edition.tgz')
-    version('20.0.0',              sha256='9168045466139b8e280f50f0606b9930ffc720bbc60bc76f5576829ac15757ae', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16229/parallel_studio_xe_2020_composer_edition.tgz')
-    version('19.1.2',              sha256='42af16e9a91226978bb401d9f17b628bc279aa8cb104d4a38ba0808234a79bdd', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16759/parallel_studio_xe_2020_update2_composer_edition.tgz')
-    version('19.1.1',              sha256='26c7e7da87b8a83adfd408b2a354d872be97736abed837364c1bf10f4469b01e', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16530/parallel_studio_xe_2020_update1_composer_edition.tgz')
-    version('19.1.0',              sha256='9168045466139b8e280f50f0606b9930ffc720bbc60bc76f5576829ac15757ae', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16229/parallel_studio_xe_2020_composer_edition.tgz')
-    version('19.0.5',              sha256='e8c8e4b9b46826a02c49325c370c79f896858611bf33ddb7fb204614838ad56c', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15813/parallel_studio_xe_2019_update5_composer_edition.tgz')
-    version('19.0.4',              sha256='1915993445323e1e78d6de73702a88fa3df2036109cde03d74ee38fef9f1abf2', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15537/parallel_studio_xe_2019_update4_composer_edition.tgz')
-    version('19.0.3',              sha256='15373ac6df2a84e6dd9fa0eac8b5f07ab00cdbb67f494161fd0d4df7a71aff8e', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15272/parallel_studio_xe_2019_update3_composer_edition.tgz')
+    version('20.0.4',              sha256='ac1efeff608a8c3a416e6dfe20364061e8abf62d35fbaacdffe3fc9676fc1aa3', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/17117/parallel_studio_xe_2020_update4_composer_edition.tgz')
+    version('20.0.2',              sha256='42af16e9a91226978bb401d9f17b628bc279aa8cb104d4a38ba0808234a79bdd', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16759/parallel_studio_xe_2020_update2_composer_edition.tgz')
+    version('20.0.1',              sha256='26c7e7da87b8a83adfd408b2a354d872be97736abed837364c1bf10f4469b01e', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16530/parallel_studio_xe_2020_update1_composer_edition.tgz')
+    version('20.0.0',              sha256='9168045466139b8e280f50f0606b9930ffc720bbc60bc76f5576829ac15757ae', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16229/parallel_studio_xe_2020_composer_edition.tgz')
+    version('19.1.2',              sha256='42af16e9a91226978bb401d9f17b628bc279aa8cb104d4a38ba0808234a79bdd', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16759/parallel_studio_xe_2020_update2_composer_edition.tgz')
+    version('19.1.1',              sha256='26c7e7da87b8a83adfd408b2a354d872be97736abed837364c1bf10f4469b01e', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16530/parallel_studio_xe_2020_update1_composer_edition.tgz')
+    version('19.1.0',              sha256='9168045466139b8e280f50f0606b9930ffc720bbc60bc76f5576829ac15757ae', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16229/parallel_studio_xe_2020_composer_edition.tgz')
+    version('19.0.5',              sha256='e8c8e4b9b46826a02c49325c370c79f896858611bf33ddb7fb204614838ad56c', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15813/parallel_studio_xe_2019_update5_composer_edition.tgz')
+    version('19.0.4',              sha256='1915993445323e1e78d6de73702a88fa3df2036109cde03d74ee38fef9f1abf2', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15537/parallel_studio_xe_2019_update4_composer_edition.tgz')
+    version('19.0.3',              sha256='15373ac6df2a84e6dd9fa0eac8b5f07ab00cdbb67f494161fd0d4df7a71aff8e', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15272/parallel_studio_xe_2019_update3_composer_edition.tgz')
     version('19.0.1',              sha256='db000cb2ebf411f6e91719db68a0c68b8d3f7d38ad7f2049ea5b2f1b5f006c25', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/14832/parallel_studio_xe_2019_update1_composer_edition.tgz')
-    version('19.0.0',              sha256='e1a29463038b063e01f694e2817c0fcf1a8e824e24f15a26ce85f20afa3f963a', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13581/parallel_studio_xe_2019_composer_edition.tgz')
+    version('19.0.0',              sha256='e1a29463038b063e01f694e2817c0fcf1a8e824e24f15a26ce85f20afa3f963a', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13581/parallel_studio_xe_2019_composer_edition.tgz')
 
     # Version 18.0.5 comes with parallel studio 2018 update 4. See:
     # https://software.intel.com/en-us/articles/intel-compiler-and-composer-update-version-numbers-to-compiler-version-number-mapping
-    version('18.0.5',              sha256='94aca8f091dff9535b02f022a37aef150b36925c8ef069335621496f8e4db267', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13722/parallel_studio_xe_2018_update4_composer_edition.tgz')
-    version('18.0.3',              sha256='f21f7759709a3d3e3390a8325fa89ac79b1fce8890c292e73b2ba3ec576ebd2b', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13002/parallel_studio_xe_2018_update3_composer_edition.tgz')
-    version('18.0.2',              sha256='02d2a9fb10d9810f85dd77700215c4348d2e4475e814e4f086eb1442462667ff', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12722/parallel_studio_xe_2018_update2_composer_edition.tgz')
+    version('18.0.5',              sha256='94aca8f091dff9535b02f022a37aef150b36925c8ef069335621496f8e4db267', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13722/parallel_studio_xe_2018_update4_composer_edition.tgz')
+    version('18.0.3',              sha256='f21f7759709a3d3e3390a8325fa89ac79b1fce8890c292e73b2ba3ec576ebd2b', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/13002/parallel_studio_xe_2018_update3_composer_edition.tgz')
+    version('18.0.2',              sha256='02d2a9fb10d9810f85dd77700215c4348d2e4475e814e4f086eb1442462667ff', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12722/parallel_studio_xe_2018_update2_composer_edition.tgz')
     version('18.0.1',              sha256='db9aa417da185a03a63330c9d76ee8e88496ae6b771584d19003a29eedc7cab5', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12381/parallel_studio_xe_2018_update1_composer_edition.tgz')
     version('18.0.0',              sha256='ecad64360fdaff2548a0ea250a396faf680077c5a83c3c3ce2c55f4f4270b904', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12067/parallel_studio_xe_2018_composer_edition.tgz')
     #
-    version('17.0.7',              sha256='661e33b68e47bf335694d2255f5883955234e9085c8349783a5794eed2a937ad', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12860/parallel_studio_xe_2017_update7_composer_edition.tgz')
-    version('17.0.6',              sha256='771f50746fe130ea472394c42e25d2c7edae049ad809d2050945ef637becf65f', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12538/parallel_studio_xe_2017_update6_composer_edition.tgz')
+    version('17.0.7',              sha256='661e33b68e47bf335694d2255f5883955234e9085c8349783a5794eed2a937ad', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12860/parallel_studio_xe_2017_update7_composer_edition.tgz')
+    version('17.0.6',              sha256='771f50746fe130ea472394c42e25d2c7edae049ad809d2050945ef637becf65f', url='https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12538/parallel_studio_xe_2017_update6_composer_edition.tgz')
     version('17.0.5',              sha256='ede4ea9351fcf263103588ae0f130b4c2a79395529cdb698b0d6e866c4871f78', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/12144/parallel_studio_xe_2017_update5_composer_edition.tgz')
     version('17.0.4',              sha256='4304766f80206a27709be61641c16782fccf2b3fcf7285782cce921ddc9b10ff', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/11541/parallel_studio_xe_2017_update4_composer_edition.tgz')
     version('17.0.3',              sha256='3648578d7bba993ebb1da37c173979bfcfb47f26e7f4e17f257e78dea8fd96ab', url='http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/11464/parallel_studio_xe_2017_update3_composer_edition.tgz')
diff --git a/var/spack/repos/builtin/packages/interproscan/package.py b/var/spack/repos/builtin/packages/interproscan/package.py
index 38a8e947bc..5639f6caf1 100644
--- a/var/spack/repos/builtin/packages/interproscan/package.py
+++ b/var/spack/repos/builtin/packages/interproscan/package.py
@@ -24,7 +24,7 @@ class Interproscan(Package):
     resource(
         when='@:4.8',
         name='binaries',
-        url="http://ftp.ebi.ac.uk/pub/databases/interpro/iprscan/BIN/4.x/iprscan_bin4.x_Linux64.tar.gz",
+        url="https://ftp.ebi.ac.uk/pub/databases/interpro/iprscan/BIN/4.x/iprscan_bin4.x_Linux64.tar.gz",
         sha256='551610a4682b112522f3ded5268f76ba9a47399a72e726fafb17cc938a50e7ee',
     )
 
diff --git a/var/spack/repos/builtin/packages/iozone/package.py b/var/spack/repos/builtin/packages/iozone/package.py
index 8bb7ad9f63..6cf9758a36 100644
--- a/var/spack/repos/builtin/packages/iozone/package.py
+++ b/var/spack/repos/builtin/packages/iozone/package.py
@@ -14,7 +14,7 @@ class Iozone(MakefilePackage):
     machines and runs under many operating systems."""
 
     homepage = "https://www.iozone.org/"
-    url      = "http://www.iozone.org/src/current/iozone3_465.tar"
+    url      = "https://www.iozone.org/src/current/iozone3_465.tar"
 
     version('3_491', sha256='2cc4842d382e46a585d1df9ae1e255695480dcc0fc05c3b1cb32ef3493d0ec9a')
     version('3_465', sha256='2e3d72916e7d7340a7c505fc0c3d28553fcc5ff2daf41d811368e55bd4e6a293')
diff --git a/var/spack/repos/builtin/packages/itsx/package.py b/var/spack/repos/builtin/packages/itsx/package.py
index 9442472960..c7ba13964b 100644
--- a/var/spack/repos/builtin/packages/itsx/package.py
+++ b/var/spack/repos/builtin/packages/itsx/package.py
@@ -12,7 +12,7 @@ class Itsx(Package):
        environmental sequencing"""
 
     homepage = "https://microbiology.se/software/itsx/"
-    url      = "http://microbiology.se/sw/ITSx_1.0.11.tar.gz"
+    url      = "https://microbiology.se/sw/ITSx_1.0.11.tar.gz"
 
     version('1.0.11', sha256='8f4f76fc9c43b61f4dd4cd8dc4e495e9687943e15515396583f7a757651d435e')
 
diff --git a/var/spack/repos/builtin/packages/jbigkit/package.py b/var/spack/repos/builtin/packages/jbigkit/package.py
index 1b190036a4..cb81f59faf 100644
--- a/var/spack/repos/builtin/packages/jbigkit/package.py
+++ b/var/spack/repos/builtin/packages/jbigkit/package.py
@@ -11,7 +11,7 @@ class Jbigkit(MakefilePackage):
     the JBIG1 data compression standard."""
 
     homepage = "https://www.cl.cam.ac.uk/~mgk25/jbigkit/"
-    url      = "http://www.cl.cam.ac.uk/~mgk25/jbigkit/download/jbigkit-2.1.tar.gz"
+    url      = "https://www.cl.cam.ac.uk/~mgk25/jbigkit/download/jbigkit-2.1.tar.gz"
 
     version('2.1', sha256='de7106b6bfaf495d6865c7dd7ac6ca1381bd12e0d81405ea81e7f2167263d932')
     version('1.6', sha256='d841b6d0723c1082450967f3ea500be01810a34ec4a97ad10985ae7071a6150b')
diff --git a/var/spack/repos/builtin/packages/jchronoss/package.py b/var/spack/repos/builtin/packages/jchronoss/package.py
index 2fcc062de2..fa430ed684 100644
--- a/var/spack/repos/builtin/packages/jchronoss/package.py
+++ b/var/spack/repos/builtin/packages/jchronoss/package.py
@@ -12,7 +12,7 @@ class Jchronoss(CMakePackage):
      to scale as much as the application does. """
 
     homepage = "https://jchronoss.hpcframework.com"
-    url      = "http://fs.paratools.com/mpc/contrib/apps/jchronoss/JCHRONOSS-1.2.tar.gz"
+    url      = "https://fs.paratools.com/mpc/contrib/apps/jchronoss/JCHRONOSS-1.2.tar.gz"
 
     version('1.2',   sha256='52a565a28c0b83b433065060863d29f2b3e4b05f4f26b7a5893a21a2c66d6eba')
     version('1.1.1', sha256='5a11463b7295817f503c58dda1a82c0d3568bdee5e9d13d59e00d337ba84dc45')
diff --git a/var/spack/repos/builtin/packages/jellyfish/package.py b/var/spack/repos/builtin/packages/jellyfish/package.py
index 228aa77fa9..6dadf793d1 100644
--- a/var/spack/repos/builtin/packages/jellyfish/package.py
+++ b/var/spack/repos/builtin/packages/jellyfish/package.py
@@ -12,11 +12,11 @@ class Jellyfish(AutotoolsPackage):
 
     homepage = "https://www.cbcb.umd.edu/software/jellyfish/"
     url      = "https://github.com/gmarcais/Jellyfish/releases/download/v2.2.7/jellyfish-2.2.7.tar.gz"
-    list_url = "http://www.cbcb.umd.edu/software/jellyfish/"
+    list_url = "https://www.cbcb.umd.edu/software/jellyfish/"
 
     version('2.2.7', sha256='d80420b4924aa0119353a5b704f923863abc802e94efeb531593147c13e631a8')
     version('1.1.11', sha256='496645d96b08ba35db1f856d857a159798c73cbc1eccb852ef1b253d1678c8e2',
-            url='http://www.cbcb.umd.edu/software/jellyfish/jellyfish-1.1.11.tar.gz')
+            url='https://www.cbcb.umd.edu/software/jellyfish/jellyfish-1.1.11.tar.gz')
 
     depends_on('perl', type=('build', 'run'))
     depends_on('python', type=('build', 'run'))
diff --git a/var/spack/repos/builtin/packages/kahip/package.py b/var/spack/repos/builtin/packages/kahip/package.py
index 74e3fe0317..e9f4c4501b 100644
--- a/var/spack/repos/builtin/packages/kahip/package.py
+++ b/var/spack/repos/builtin/packages/kahip/package.py
@@ -23,7 +23,7 @@ class Kahip(SConsPackage):
     """
 
     homepage  = 'http://algo2.iti.kit.edu/documents/kahip/index.html'
-    url       = 'http://algo2.iti.kit.edu/schulz/software_releases/KaHIP_2.00.tar.gz'
+    url       = 'https://algo2.iti.kit.edu/schulz/software_releases/KaHIP_2.00.tar.gz'
     git       = 'https://github.com/schulzchristian/KaHIP.git'
 
     version('develop', branch='master')
diff --git a/var/spack/repos/builtin/packages/keepalived/package.py b/var/spack/repos/builtin/packages/keepalived/package.py
index bdf33e4115..20dfb91b04 100644
--- a/var/spack/repos/builtin/packages/keepalived/package.py
+++ b/var/spack/repos/builtin/packages/keepalived/package.py
@@ -13,7 +13,7 @@ class Keepalived(AutotoolsPackage):
     """
 
     homepage = "https://www.keepalived.org"
-    url      = "http://www.keepalived.org/software/keepalived-1.2.0.tar.gz"
+    url      = "https://www.keepalived.org/software/keepalived-1.2.0.tar.gz"
 
     version('2.0.19', sha256='0e2f8454765bc6a5fa26758bd9cec18aae42882843cdd24848aff0ae65ce4ca7')
     version('2.0.18', sha256='1423a2b1b8e541211029b9e1e1452e683bbe5f4b0b287eddd609aaf5ff024fd0')
diff --git a/var/spack/repos/builtin/packages/ldak/package.py b/var/spack/repos/builtin/packages/ldak/package.py
index 40327ced4e..15ac48f0a0 100644
--- a/var/spack/repos/builtin/packages/ldak/package.py
+++ b/var/spack/repos/builtin/packages/ldak/package.py
@@ -10,7 +10,7 @@ class Ldak(Package):
     """LDAK is a software package for analyzing GWAS data"""
 
     homepage = "https://dougspeed.com/ldak/"
-    url      = "http://dougspeed.com/wp-content/uploads/source.zip"
+    url      = "https://dougspeed.com/wp-content/uploads/source.zip"
 
     version('5.1', sha256='ae3eb8c2ef31af210e138336fd6edcd0e3a26ea9bae89fd6c0c6ea33e3a1517e')
 
diff --git a/var/spack/repos/builtin/packages/ldc-bootstrap/package.py b/var/spack/repos/builtin/packages/ldc-bootstrap/package.py
index 5ae15f3b4e..d481e5afb3 100644
--- a/var/spack/repos/builtin/packages/ldc-bootstrap/package.py
+++ b/var/spack/repos/builtin/packages/ldc-bootstrap/package.py
@@ -13,7 +13,7 @@ class LdcBootstrap(CMakePackage):
     LDC is fully Open Source; the parts of the code not taken/adapted from
     other projects are BSD-licensed (see the LICENSE file for details).
 
-    Consult the D wiki for further information: http://wiki.dlang.org/LDC
+    Consult the D wiki for further information: https://wiki.dlang.org/LDC
 
     This old version of the compiler is needed to bootstrap newer ones.
     """
diff --git a/var/spack/repos/builtin/packages/ldc/package.py b/var/spack/repos/builtin/packages/ldc/package.py
index b1944ecce2..26603922bc 100644
--- a/var/spack/repos/builtin/packages/ldc/package.py
+++ b/var/spack/repos/builtin/packages/ldc/package.py
@@ -13,7 +13,7 @@ class Ldc(CMakePackage):
     LDC is fully Open Source; the parts of the code not taken/adapted from
     other projects are BSD-licensed (see the LICENSE file for details).
 
-    Consult the D wiki for further information: http://wiki.dlang.org/LDC
+    Consult the D wiki for further information: https://wiki.dlang.org/LDC
     """
 
     homepage = "https://dlang.org/"
diff --git a/var/spack/repos/builtin/packages/lemon/package.py b/var/spack/repos/builtin/packages/lemon/package.py
index f839a0fe54..781e90617c 100644
--- a/var/spack/repos/builtin/packages/lemon/package.py
+++ b/var/spack/repos/builtin/packages/lemon/package.py
@@ -13,6 +13,6 @@ class Lemon(CMakePackage):
     optimization tasks connected mainly with graphs and networks."""
 
     homepage = "https://lemon.cs.elte.hu/trac/lemon"
-    url      = "http://lemon.cs.elte.hu/pub/sources/lemon-1.3.1.tar.gz"
+    url      = "https://lemon.cs.elte.hu/pub/sources/lemon-1.3.1.tar.gz"
 
     version('1.3.1', sha256='71b7c725f4c0b4a8ccb92eb87b208701586cf7a96156ebd821ca3ed855bad3c8')
diff --git a/var/spack/repos/builtin/packages/less/package.py b/var/spack/repos/builtin/packages/less/package.py
index fe7884e7e2..2ed03ad843 100644
--- a/var/spack/repos/builtin/packages/less/package.py
+++ b/var/spack/repos/builtin/packages/less/package.py
@@ -12,7 +12,7 @@ class Less(AutotoolsPackage):
     file aswell as forwards."""
 
     homepage = "https://www.greenwoodsoftware.com/less/"
-    url      = "http://www.greenwoodsoftware.com/less/less-551.zip"
+    url      = "https://www.greenwoodsoftware.com/less/less-551.zip"
 
     version('551', sha256='2630db16ef188e88b513b3cc24daa9a798c45643cc7da06e549c9c00cfd84244')
     version('530', sha256='8c1652ba88a726314aa2616d1c896ca8fe9a30253a5a67bc21d444e79a6c6bc3')
diff --git a/var/spack/repos/builtin/packages/lftp/package.py b/var/spack/repos/builtin/packages/lftp/package.py
index 606fc7dbe0..98b606736b 100644
--- a/var/spack/repos/builtin/packages/lftp/package.py
+++ b/var/spack/repos/builtin/packages/lftp/package.py
@@ -11,7 +11,7 @@ class Lftp(AutotoolsPackage):
        of network protocols (ftp, http, sftp, fish, torrent)."""
 
     homepage = "https://lftp.yar.ru/"
-    url      = "http://lftp.yar.ru/ftp/lftp-4.7.7.tar.gz"
+    url      = "https://lftp.yar.ru/ftp/lftp-4.7.7.tar.gz"
 
     version('4.8.1', sha256='6117866215cd889dab30ff73292cd1d35fe0e12a9af5cd76d093500d07ab65a3')
     version('4.7.7', sha256='7bce216050094a1146ed05bed8fe5b3518224764ffe98884a848d44dc76fff8f')
diff --git a/var/spack/repos/builtin/packages/lhapdf5/package.py b/var/spack/repos/builtin/packages/lhapdf5/package.py
index f9e813221f..ba3149c6bc 100644
--- a/var/spack/repos/builtin/packages/lhapdf5/package.py
+++ b/var/spack/repos/builtin/packages/lhapdf5/package.py
@@ -11,7 +11,7 @@ class Lhapdf5(AutotoolsPackage):
     used for evaluating PDFs from discretised data files."""
 
     homepage = "https://lhapdf.hepforge.org/lhapdf5/"
-    url      = "http://lhapdf.hepforge.org/downloads?f=old/lhapdf-5.9.1.tar.gz"
+    url      = "https://lhapdf.hepforge.org/downloads?f=old/lhapdf-5.9.1.tar.gz"
 
     version('5.9.1', sha256='86b9b046d7f25627ce2aab6847ef1c5534972f4bae18de98225080cf5086919c')
     version('5.9.0', sha256='64b9018ce6102ae7b6a92c990ca6afa841fb992d87b1abf5756c3d04c4d46b9c')
diff --git a/var/spack/repos/builtin/packages/libarchive/package.py b/var/spack/repos/builtin/packages/libarchive/package.py
index 35c07c0b77..b9eca56b97 100644
--- a/var/spack/repos/builtin/packages/libarchive/package.py
+++ b/var/spack/repos/builtin/packages/libarchive/package.py
@@ -11,7 +11,7 @@ class Libarchive(AutotoolsPackage):
        writing tar, cpio, zip, ISO, and other archive formats."""
 
     homepage = "https://www.libarchive.org"
-    url      = "http://www.libarchive.org/downloads/libarchive-3.1.2.tar.gz"
+    url      = "https://www.libarchive.org/downloads/libarchive-3.1.2.tar.gz"
     maintainers = ['haampie']
 
     version('3.5.2', sha256='5f245bd5176bc5f67428eb0aa497e09979264a153a074d35416521a5b8e86189')
diff --git a/var/spack/repos/builtin/packages/libcanberra/package.py b/var/spack/repos/builtin/packages/libcanberra/package.py
index 5545b71022..eb521bee9a 100644
--- a/var/spack/repos/builtin/packages/libcanberra/package.py
+++ b/var/spack/repos/builtin/packages/libcanberra/package.py
@@ -12,7 +12,7 @@ class Libcanberra(AutotoolsPackage):
     such as GNOME."""
 
     homepage = "https://0pointer.de/lennart/projects/libcanberra/"
-    url      = "http://0pointer.de/lennart/projects/libcanberra/libcanberra-0.30.tar.xz"
+    url      = "https://0pointer.de/lennart/projects/libcanberra/libcanberra-0.30.tar.xz"
 
     version('0.30', sha256='c2b671e67e0c288a69fc33dc1b6f1b534d07882c2aceed37004bf48c601afa72')
 
diff --git a/var/spack/repos/builtin/packages/libdaemon/package.py b/var/spack/repos/builtin/packages/libdaemon/package.py
index ea0872f660..de04581fc6 100644
--- a/var/spack/repos/builtin/packages/libdaemon/package.py
+++ b/var/spack/repos/builtin/packages/libdaemon/package.py
@@ -11,7 +11,7 @@ class Libdaemon(AutotoolsPackage):
     UNIX daemons."""
 
     homepage = "https://0pointer.de/lennart/projects/libdaemon/"
-    url      = "http://0pointer.de/lennart/projects/libdaemon/libdaemon-0.14.tar.gz"
+    url      = "https://0pointer.de/lennart/projects/libdaemon/libdaemon-0.14.tar.gz"
 
     version('0.14', sha256='fd23eb5f6f986dcc7e708307355ba3289abe03cc381fc47a80bca4a50aa6b834')
     version('0.13', sha256='bd949d459d2da54f1cdfbd1f4592e32541e8a195aca56fa7a8329ed79836d709')
diff --git a/var/spack/repos/builtin/packages/libdwarf/package.py b/var/spack/repos/builtin/packages/libdwarf/package.py
index c60fa76df3..dd51b08e1a 100644
--- a/var/spack/repos/builtin/packages/libdwarf/package.py
+++ b/var/spack/repos/builtin/packages/libdwarf/package.py
@@ -25,7 +25,7 @@ class Libdwarf(Package):
        MIPS/IRIX C compiler."""
 
     homepage = "https://www.prevanders.net/dwarf.html"
-    url      = "http://www.prevanders.net/libdwarf-20160507.tar.gz"
+    url      = "https://www.prevanders.net/libdwarf-20160507.tar.gz"
     list_url = homepage
 
     version('20180129', sha256='8bd91b57064b0c14ade5a009d3a1ce819f1b6ec0e189fc876eb8f42a8720d8a6')
diff --git a/var/spack/repos/builtin/packages/libedit/package.py b/var/spack/repos/builtin/packages/libedit/package.py
index 192842d4c8..341c161930 100644
--- a/var/spack/repos/builtin/packages/libedit/package.py
+++ b/var/spack/repos/builtin/packages/libedit/package.py
@@ -9,7 +9,7 @@ from spack import *
 class Libedit(AutotoolsPackage):
     """An autotools compatible port of the NetBSD editline library"""
     homepage = "https://thrysoee.dk/editline/"
-    url      = "http://thrysoee.dk/editline/libedit-20170329-3.1.tar.gz"
+    url      = "https://thrysoee.dk/editline/libedit-20170329-3.1.tar.gz"
 
     version('3.1-20210216', sha256='2283f741d2aab935c8c52c04b57bf952d02c2c02e651172f8ac811f77b1fc77a')
     version('3.1-20191231', sha256='dbb82cb7e116a5f8025d35ef5b4f7d4a3cdd0a3909a146a39112095a2d229071')
diff --git a/var/spack/repos/builtin/packages/libevent/package.py b/var/spack/repos/builtin/packages/libevent/package.py
index d24c9ecd3b..764eca3423 100644
--- a/var/spack/repos/builtin/packages/libevent/package.py
+++ b/var/spack/repos/builtin/packages/libevent/package.py
@@ -16,7 +16,7 @@ class Libevent(AutotoolsPackage):
 
     homepage = "https://libevent.org"
     url      = "https://github.com/libevent/libevent/releases/download/release-2.1.8-stable/libevent-2.1.8-stable.tar.gz"
-    list_url = "http://libevent.org/old-releases.html"
+    list_url = "https://libevent.org/old-releases.html"
 
     version('2.1.12', sha256='92e6de1be9ec176428fd2367677e61ceffc2ee1cb119035037a27d346b0403bb')
     version('2.1.11', sha256='a65bac6202ea8c5609fd5c7e480e6d25de467ea1917c08290c521752f147283d')
diff --git a/var/spack/repos/builtin/packages/libjpeg/package.py b/var/spack/repos/builtin/packages/libjpeg/package.py
index b24ab503b5..6194535111 100644
--- a/var/spack/repos/builtin/packages/libjpeg/package.py
+++ b/var/spack/repos/builtin/packages/libjpeg/package.py
@@ -12,7 +12,7 @@ class Libjpeg(AutotoolsPackage):
     alongside various utilities for handling JPEG data."""
 
     homepage = "http://www.ijg.org"
-    url      = "http://www.ijg.org/files/jpegsrc.v9d.tar.gz"
+    url      = "https://www.ijg.org/files/jpegsrc.v9d.tar.gz"
 
     version('9d', sha256='6c434a3be59f8f62425b2e3c077e785c9ce30ee5874ea1c270e843f273ba71ee')
     version('9c', sha256='650250979303a649e21f87b5ccd02672af1ea6954b911342ea491f351ceb7122')
diff --git a/var/spack/repos/builtin/packages/libmad/package.py b/var/spack/repos/builtin/packages/libmad/package.py
index cd9273509f..c700a5cde8 100644
--- a/var/spack/repos/builtin/packages/libmad/package.py
+++ b/var/spack/repos/builtin/packages/libmad/package.py
@@ -21,7 +21,7 @@ class Libmad(AutotoolsPackage):
     depends_on('m4', type='build')
 
     # Patch orignally from here, adapted to create missing files:
-    # http://www.linuxfromscratch.org/blfs/view/svn/multimedia/libmad.html
+    # https://www.linuxfromscratch.org/blfs/view/svn/multimedia/libmad.html
     patch('libmad-0.15.1b.patch')
 
     force_autoreconf = True
diff --git a/var/spack/repos/builtin/packages/libpaper/package.py b/var/spack/repos/builtin/packages/libpaper/package.py
index 56e81ccbf8..e5ec5f5a48 100644
--- a/var/spack/repos/builtin/packages/libpaper/package.py
+++ b/var/spack/repos/builtin/packages/libpaper/package.py
@@ -12,7 +12,7 @@ class Libpaper(AutotoolsPackage):
     user-specified paper size."""
 
     homepage = "https://packages.debian.org/unstable/source/libpaper"
-    url      = "http://deb.debian.org/debian/pool/main/libp/libpaper/libpaper_1.1.28.tar.gz"
+    url      = "https://deb.debian.org/debian/pool/main/libp/libpaper/libpaper_1.1.28.tar.gz"
 
     version('1.1.28', sha256='c8bb946ec93d3c2c72bbb1d7257e90172a22a44a07a07fb6b802a5bb2c95fddc')
 
diff --git a/var/spack/repos/builtin/packages/libpcap/package.py b/var/spack/repos/builtin/packages/libpcap/package.py
index 070bdafe67..c8615f7291 100644
--- a/var/spack/repos/builtin/packages/libpcap/package.py
+++ b/var/spack/repos/builtin/packages/libpcap/package.py
@@ -9,8 +9,8 @@ from spack import *
 class Libpcap(AutotoolsPackage):
     """libpcap is a portable library in C/C++ for packet capture."""
     homepage = "https://www.tcpdump.org/"
-    list_url = "http://www.tcpdump.org/release/"
-    url      = "http://www.tcpdump.org/release/libpcap-1.8.1.tar.gz"
+    list_url = "https://www.tcpdump.org/release/"
+    url      = "https://www.tcpdump.org/release/libpcap-1.8.1.tar.gz"
 
     version('1.10.0', sha256='8d12b42623eeefee872f123bd0dc85d535b00df4d42e865f993c40f7bfc92b1e')
     version('1.9.1',  sha256='635237637c5b619bcceba91900666b64d56ecb7be63f298f601ec786ce087094')
diff --git a/var/spack/repos/builtin/packages/libpipeline/package.py b/var/spack/repos/builtin/packages/libpipeline/package.py
index 4f04bac81e..48aa83f707 100644
--- a/var/spack/repos/builtin/packages/libpipeline/package.py
+++ b/var/spack/repos/builtin/packages/libpipeline/package.py
@@ -11,7 +11,7 @@ class Libpipeline(AutotoolsPackage):
     in a flexible and convenient way."""
 
     homepage = "http://libpipeline.nongnu.org/"
-    url      = "http://git.savannah.nongnu.org/cgit/libpipeline.git/snapshot/libpipeline-1.4.2.tar.gz"
+    url      = "https://git.savannah.nongnu.org/cgit/libpipeline.git/snapshot/libpipeline-1.4.2.tar.gz"
 
     version('1.4.2', sha256='ac8b103b281ff63129c4fa6a8cc40bb5863e3a4266343d6e3bb5788de1ede488')
 
diff --git a/var/spack/repos/builtin/packages/libquo/package.py b/var/spack/repos/builtin/packages/libquo/package.py
index 488c79b0ba..c199e15c99 100644
--- a/var/spack/repos/builtin/packages/libquo/package.py
+++ b/var/spack/repos/builtin/packages/libquo/package.py
@@ -12,7 +12,7 @@ class Libquo(AutotoolsPackage):
     single- and multi-threaded libraries."""
 
     homepage = "https://github.com/lanl/libquo"
-    url      = "http://lanl.github.io/libquo/dists/libquo-1.3.1.tar.gz"
+    url      = "https://lanl.github.io/libquo/dists/libquo-1.3.1.tar.gz"
     git      = "https://github.com/lanl/libquo.git"
 
     maintainers = ['samuelkgutierrez']
diff --git a/var/spack/repos/builtin/packages/libsecret/package.py b/var/spack/repos/builtin/packages/libsecret/package.py
index 20843a25f5..6d45223603 100644
--- a/var/spack/repos/builtin/packages/libsecret/package.py
+++ b/var/spack/repos/builtin/packages/libsecret/package.py
@@ -37,7 +37,7 @@ class Libsecret(AutotoolsPackage):
         url = 'http://ftp.gnome.org/pub/gnome/sources/libsecret'
         return url + '/%s/libsecret-%s.tar.xz' % (version.up_to(2), version)
 
-    # http://www.linuxfromscratch.org/blfs/view/svn/gnome/libsecret.html
+    # https://www.linuxfromscratch.org/blfs/view/svn/gnome/libsecret.html
     def configure_args(self):
         args = []
         args.append('--disable-static')
diff --git a/var/spack/repos/builtin/packages/libspatialite/package.py b/var/spack/repos/builtin/packages/libspatialite/package.py
index 8e87ef1cef..a1dc87b77f 100644
--- a/var/spack/repos/builtin/packages/libspatialite/package.py
+++ b/var/spack/repos/builtin/packages/libspatialite/package.py
@@ -13,7 +13,7 @@ class Libspatialite(AutotoolsPackage):
        SQLite core to support fully fledged Spatial SQL capabilities."""
 
     homepage = "https://www.gaia-gis.it"
-    url      = "http://www.gaia-gis.it/gaia-sins/libspatialite-sources/libspatialite-4.3.0a.tar.gz"
+    url      = "https://www.gaia-gis.it/gaia-sins/libspatialite-sources/libspatialite-4.3.0a.tar.gz"
     manual_download = True
 
     version('5.0.0', preferred=True, sha256='7b7fd70243f5a0b175696d87c46dde0ace030eacc27f39241c24bac5dfac6dac')
diff --git a/var/spack/repos/builtin/packages/libtool/package.py b/var/spack/repos/builtin/packages/libtool/package.py
index bce8c932c7..2c2906f597 100644
--- a/var/spack/repos/builtin/packages/libtool/package.py
+++ b/var/spack/repos/builtin/packages/libtool/package.py
@@ -25,7 +25,7 @@ class Libtool(AutotoolsPackage, GNUMirrorPackage):
     depends_on('texinfo', type='build', when='@develop')
 
     # Fix parsing of compiler output when collecting predeps and postdeps
-    # http://lists.gnu.org/archive/html/bug-libtool/2016-03/msg00003.html
+    # https://lists.gnu.org/archive/html/bug-libtool/2016-03/msg00003.html
     patch('flag_space.patch', when='@develop')
 
     build_directory = 'spack-build'
diff --git a/var/spack/repos/builtin/packages/libuser/package.py b/var/spack/repos/builtin/packages/libuser/package.py
index 17f16a3e8d..676ac99ac6 100644
--- a/var/spack/repos/builtin/packages/libuser/package.py
+++ b/var/spack/repos/builtin/packages/libuser/package.py
@@ -10,7 +10,7 @@ class Libuser(AutotoolsPackage):
     """A user and group account administration library."""
 
     homepage = "https://pagure.io/libuser"
-    url      = "http://releases.pagure.org/libuser/libuser-0.62.tar.xz"
+    url      = "https://releases.pagure.org/libuser/libuser-0.62.tar.xz"
 
     version('0.62', sha256='a58ff4fabb01a25043b142185a33eeea961109dd60d4b40b6a9df4fa3cace20b')
     version('0.61', sha256='0a114a52446e12781e2ffdf26f59df0d14e7809c7db5e551d3cf61c4e398751d')
diff --git a/var/spack/repos/builtin/packages/libxml2/package.py b/var/spack/repos/builtin/packages/libxml2/package.py
index 3db5246132..994f2e3db5 100644
--- a/var/spack/repos/builtin/packages/libxml2/package.py
+++ b/var/spack/repos/builtin/packages/libxml2/package.py
@@ -39,7 +39,7 @@ class Libxml2(AutotoolsPackage):
             '(lib/xml2.*$)|(lib/cmake.*$)')
 
     # XML Conformance Test Suites
-    # See http://www.w3.org/XML/Test/ for information
+    # See https://www.w3.org/XML/Test/ for information
     resource(name='xmlts', url='https://www.w3.org/XML/Test/xmlts20080827.tar.gz',
              sha256='96151685cec997e1f9f3387e3626d61e6284d4d6e66e0e440c209286c03e9cc7')
 
diff --git a/var/spack/repos/builtin/packages/linktest/package.py b/var/spack/repos/builtin/packages/linktest/package.py
index 654ebe50b4..1efef1d766 100644
--- a/var/spack/repos/builtin/packages/linktest/package.py
+++ b/var/spack/repos/builtin/packages/linktest/package.py
@@ -9,7 +9,7 @@ class Linktest(MakefilePackage):
     parallel ping-pong benchmark"""
 
     homepage = "https://www.fz-juelich.de/ias/jsc/EN/Expertise/Support/Software/LinkTest/_node.html"
-    url      = "http://apps.fz-juelich.de/jsc/linktest/download.php?version=1.2p1"
+    url      = "https://apps.fz-juelich.de/jsc/linktest/download.php?version=1.2p1"
 
     maintainers = ['pramodk']
 
diff --git a/var/spack/repos/builtin/packages/llvm/package.py b/var/spack/repos/builtin/packages/llvm/package.py
index bd707f4429..c3e4427603 100644
--- a/var/spack/repos/builtin/packages/llvm/package.py
+++ b/var/spack/repos/builtin/packages/llvm/package.py
@@ -21,7 +21,7 @@ class Llvm(CMakePackage, CudaPackage):
 
     homepage = "https://llvm.org/"
     url = "https://github.com/llvm/llvm-project/archive/llvmorg-7.1.0.tar.gz"
-    list_url = "http://releases.llvm.org/download.html"
+    list_url = "https://releases.llvm.org/download.html"
     git = "https://github.com/llvm/llvm-project"
     maintainers = ['trws', 'naromero77']
 
diff --git a/var/spack/repos/builtin/packages/lsscsi/package.py b/var/spack/repos/builtin/packages/lsscsi/package.py
index 0e98ba4cb7..ee4d080244 100644
--- a/var/spack/repos/builtin/packages/lsscsi/package.py
+++ b/var/spack/repos/builtin/packages/lsscsi/package.py
@@ -13,7 +13,7 @@ class Lsscsi(AutotoolsPackage):
     been widely used prior to the lk 2.6 series."""
 
     homepage = "https://sg.danny.cz/scsi/lsscsi.html"
-    url      = "http://sg.danny.cz/scsi/lsscsi-0.31.tgz"
+    url      = "https://sg.danny.cz/scsi/lsscsi-0.31.tgz"
 
     version('0.31',     sha256='12bf1973014803c6fd6d547e7594a4c049f0eef3bf5d22190d4be29d7c09f3ca')
     version('0.30',     sha256='619a2187405f02c5f57682f3478bffc75326803cd08839e39d434250c5518b15')
diff --git a/var/spack/repos/builtin/packages/lua-luajit/package.py b/var/spack/repos/builtin/packages/lua-luajit/package.py
index 68c6f2ec48..958ea77e10 100644
--- a/var/spack/repos/builtin/packages/lua-luajit/package.py
+++ b/var/spack/repos/builtin/packages/lua-luajit/package.py
@@ -12,7 +12,7 @@ from spack import *
 class LuaLuajit(MakefilePackage):
     """Flast flexible JITed lua"""
     homepage = "https://www.luajit.org"
-    url      = "http://luajit.org/download/LuaJIT-2.0.5.tar.gz"
+    url      = "https://luajit.org/download/LuaJIT-2.0.5.tar.gz"
 
     version('2.1.0-beta3', sha256='1ad2e34b111c802f9d0cdf019e986909123237a28c746b21295b63c9e785d9c3')
     version('2.0.5', sha256='874b1f8297c697821f561f9b73b57ffd419ed8f4278c82e05b48806d30c1e979', preferred=True)
diff --git a/var/spack/repos/builtin/packages/lua/package.py b/var/spack/repos/builtin/packages/lua/package.py
index 5574d0d59a..c3b021d96f 100644
--- a/var/spack/repos/builtin/packages/lua/package.py
+++ b/var/spack/repos/builtin/packages/lua/package.py
@@ -14,7 +14,7 @@ class Lua(Package):
     """The Lua programming language interpreter and library."""
 
     homepage = "https://www.lua.org"
-    url = "http://www.lua.org/ftp/lua-5.3.4.tar.gz"
+    url = "https://www.lua.org/ftp/lua-5.3.4.tar.gz"
 
     version('5.3.5', sha256='0c2eed3f960446e1a3e4b9a1ca2f3ff893b6ce41942cf54d5dd59ab4b3b058ac')
     version('5.3.4', sha256='f681aa518233bc407e23acf0f5887c884f17436f000d453b2491a9f11a52400c')
diff --git a/var/spack/repos/builtin/packages/lucene/package.py b/var/spack/repos/builtin/packages/lucene/package.py
index c730fd19ec..c34c15f315 100644
--- a/var/spack/repos/builtin/packages/lucene/package.py
+++ b/var/spack/repos/builtin/packages/lucene/package.py
@@ -13,8 +13,8 @@ class Lucene(Package):
     """
 
     homepage = "https://lucene.apache.org/"
-    url      = "http://archive.apache.org/dist/lucene/java/8.3.1/lucene-8.3.1.tgz"
-    list_url = "http://archive.apache.org/dist/lucene/java/"
+    url      = "https://archive.apache.org/dist/lucene/java/8.3.1/lucene-8.3.1.tgz"
+    list_url = "https://archive.apache.org/dist/lucene/java/"
     list_depth = 1
 
     version('8.3.1', sha256='acd61ad458d16f3c98b9dd4653c6a34dd666a965842e461f7cdf8947fa041e1a')
diff --git a/var/spack/repos/builtin/packages/luit/package.py b/var/spack/repos/builtin/packages/luit/package.py
index b3d4f7725d..65f9bd6179 100644
--- a/var/spack/repos/builtin/packages/luit/package.py
+++ b/var/spack/repos/builtin/packages/luit/package.py
@@ -23,6 +23,6 @@ class Luit(AutotoolsPackage, XorgPackage):
     depends_on('pkgconfig', type='build')
     depends_on('util-macros', type='build')
 
-  # see http://www.linuxquestions.org/questions/linux-from-scratch-13/can't-compile-luit-xorg-applications-4175476308/  # noqa
+  # see https://www.linuxquestions.org/questions/linux-from-scratch-13/can't-compile-luit-xorg-applications-4175476308/  # noqa
     def configure_args(self):
         return ['CFLAGS=-U_XOPEN_SOURCE -D_XOPEN_SOURCE=600']
diff --git a/var/spack/repos/builtin/packages/lzma/package.py b/var/spack/repos/builtin/packages/lzma/package.py
index 0765eecfc9..3b30c6a2d2 100644
--- a/var/spack/repos/builtin/packages/lzma/package.py
+++ b/var/spack/repos/builtin/packages/lzma/package.py
@@ -17,6 +17,6 @@ class Lzma(AutotoolsPackage):
     Utils relatively easy."""
 
     homepage = "https://tukaani.org/lzma/"
-    url      = "http://tukaani.org/lzma/lzma-4.32.7.tar.gz"
+    url      = "https://tukaani.org/lzma/lzma-4.32.7.tar.gz"
 
     version('4.32.7', sha256='9f337a8c51e5ded198d1032f5087ba3fe438f2a54e9df419e513a151775b032c')
diff --git a/var/spack/repos/builtin/packages/lzo/package.py b/var/spack/repos/builtin/packages/lzo/package.py
index 855a85d05a..bb0b05b6b2 100644
--- a/var/spack/repos/builtin/packages/lzo/package.py
+++ b/var/spack/repos/builtin/packages/lzo/package.py
@@ -10,7 +10,7 @@ class Lzo(AutotoolsPackage):
     """Real-time data compression library"""
 
     homepage = 'https://www.oberhumer.com/opensource/lzo/'
-    url = 'http://www.oberhumer.com/opensource/lzo/download/lzo-2.09.tar.gz'
+    url = 'https://www.oberhumer.com/opensource/lzo/download/lzo-2.09.tar.gz'
 
     version('2.10', sha256='c0f892943208266f9b6543b3ae308fab6284c5c90e627931446fb49b4221a072')
     version('2.09', sha256='f294a7ced313063c057c504257f437c8335c41bfeed23531ee4e6a2b87bcb34c')
diff --git a/var/spack/repos/builtin/packages/m4/package.py b/var/spack/repos/builtin/packages/m4/package.py
index fb5bc07bbd..d15be408ac 100644
--- a/var/spack/repos/builtin/packages/m4/package.py
+++ b/var/spack/repos/builtin/packages/m4/package.py
@@ -98,7 +98,7 @@ class M4(AutotoolsPackage, GNUMirrorPackage):
         else:
             args.append('--without-libsigsegv-prefix')
 
-        # http://lists.gnu.org/archive/html/bug-m4/2016-09/msg00002.html
+        # https://lists.gnu.org/archive/html/bug-m4/2016-09/msg00002.html
         arch = spec.architecture
         if (arch.platform == 'darwin' and arch.os == 'sierra' and
                 '%gcc' in spec):
diff --git a/var/spack/repos/builtin/packages/mafft/package.py b/var/spack/repos/builtin/packages/mafft/package.py
index 0747e057dd..46b29ee7ed 100644
--- a/var/spack/repos/builtin/packages/mafft/package.py
+++ b/var/spack/repos/builtin/packages/mafft/package.py
@@ -13,7 +13,7 @@ class Mafft(Package):
        FFT-NS-2 (fast; for alignment of <~30,000 sequences), etc."""
 
     homepage = "https://mafft.cbrc.jp/alignment/software/index.html"
-    url      = "http://mafft.cbrc.jp/alignment/software/mafft-7.221-with-extensions-src.tgz"
+    url      = "https://mafft.cbrc.jp/alignment/software/mafft-7.221-with-extensions-src.tgz"
 
     version('7.481', sha256='7397f1193048587a3d887e46a353418e67849f71729764e8195b218e3453dfa2')
     version('7.475', sha256='bb6973ae089ea18cfbd3861a5b9d2c8b7e1543a1fdc78ac2d7cd8dbe3443f319')
diff --git a/var/spack/repos/builtin/packages/magma/package.py b/var/spack/repos/builtin/packages/magma/package.py
index 26e467fcae..102e8d96aa 100644
--- a/var/spack/repos/builtin/packages/magma/package.py
+++ b/var/spack/repos/builtin/packages/magma/package.py
@@ -15,7 +15,7 @@ class Magma(CMakePackage, CudaPackage, ROCmPackage):
 
     homepage = "https://icl.cs.utk.edu/magma/"
     git = 'https://bitbucket.org/icl/magma'
-    url = "http://icl.cs.utk.edu/projectsfiles/magma/downloads/magma-2.2.0.tar.gz"
+    url = "https://icl.cs.utk.edu/projectsfiles/magma/downloads/magma-2.2.0.tar.gz"
     maintainers = ['stomov', 'luszczek', 'G-Ragghianti']
 
     test_requires_compiler = True
diff --git a/var/spack/repos/builtin/packages/maker/package.py b/var/spack/repos/builtin/packages/maker/package.py
index 8951b72d82..1416e21916 100644
--- a/var/spack/repos/builtin/packages/maker/package.py
+++ b/var/spack/repos/builtin/packages/maker/package.py
@@ -29,7 +29,7 @@ class Maker(Package):
     download link. Spack will search your current directory for the download
     file. Alternatively, add this file to a mirror so that Spack can find it.
     For instructions on how to set up a mirror, see
-    http://spack.readthedocs.io/en/latest/mirrors.html"""
+    https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "https://www.yandell-lab.org/software/maker.html"
     manual_download = True
diff --git a/var/spack/repos/builtin/packages/man-db/package.py b/var/spack/repos/builtin/packages/man-db/package.py
index 349936af5a..91a222377b 100644
--- a/var/spack/repos/builtin/packages/man-db/package.py
+++ b/var/spack/repos/builtin/packages/man-db/package.py
@@ -13,7 +13,7 @@ class ManDb(AutotoolsPackage):
     flat-text whatis databases."""
 
     homepage = "https://www.nongnu.org/man-db/"
-    url      = "http://git.savannah.nongnu.org/cgit/man-db.git/snapshot/man-db-2.7.6.1.tar.gz"
+    url      = "https://git.savannah.nongnu.org/cgit/man-db.git/snapshot/man-db-2.7.6.1.tar.gz"
 
     version('2.7.6.1', sha256='dd913662e341fc01e6721878b6cbe1001886cc3bfa6632b095937bba3238c779')
 
diff --git a/var/spack/repos/builtin/packages/mapsplice2/package.py b/var/spack/repos/builtin/packages/mapsplice2/package.py
index 491194813b..0f9f1c1139 100644
--- a/var/spack/repos/builtin/packages/mapsplice2/package.py
+++ b/var/spack/repos/builtin/packages/mapsplice2/package.py
@@ -13,7 +13,7 @@ class Mapsplice2(MakefilePackage):
        and not on any further annotations."""
 
     homepage = "http://www.netlab.uky.edu/p/bioinfo/MapSplice2"
-    url = "http://protocols.netlab.uky.edu/~zeng/MapSplice-v2.2.1.zip"
+    url = "https://protocols.netlab.uky.edu/~zeng/MapSplice-v2.2.1.zip"
 
     version(
         "2.2.1",
diff --git a/var/spack/repos/builtin/packages/mark/package.py b/var/spack/repos/builtin/packages/mark/package.py
index e3d727b5cb..eda102108e 100644
--- a/var/spack/repos/builtin/packages/mark/package.py
+++ b/var/spack/repos/builtin/packages/mark/package.py
@@ -18,7 +18,7 @@ class Mark(Package):
     Step(1). Spack will search your current directory for the download file.
     Alternatively, add this file to a mirror so that Spack can find it.
     For instructions on how to set up a mirror, see
-    http://spack.readthedocs.io/en/latest/mirrors.html"""
+    https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "http://www.phidot.org/software/mark/index.html"
     manual_download = True
diff --git a/var/spack/repos/builtin/packages/mathematica/package.py b/var/spack/repos/builtin/packages/mathematica/package.py
index 0334eda1bf..3b9d4badd0 100644
--- a/var/spack/repos/builtin/packages/mathematica/package.py
+++ b/var/spack/repos/builtin/packages/mathematica/package.py
@@ -16,7 +16,7 @@ class Mathematica(Package):
        Spack will search your current directory for the download file.
        Alternatively, add this file to a mirror so that Spack can find it.
        For instructions on how to set up a mirror, see
-       http://spack.readthedocs.io/en/latest/mirrors.html"""
+       https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "https://www.wolfram.com/mathematica/"
     url = 'file://{0}/Mathematica_12.0.0_LINUX.sh'.format(os.getcwd())
diff --git a/var/spack/repos/builtin/packages/matlab/package.py b/var/spack/repos/builtin/packages/matlab/package.py
index 6d28cab318..17cfe0e46a 100644
--- a/var/spack/repos/builtin/packages/matlab/package.py
+++ b/var/spack/repos/builtin/packages/matlab/package.py
@@ -21,7 +21,7 @@ class Matlab(Package):
     the MathWorks homepage and download MATLAB yourself. Spack will search your
     current directory for the download file. Alternatively, add this file to a
     mirror so that Spack can find it. For instructions on how to set up a
-    mirror, see http://spack.readthedocs.io/en/latest/mirrors.html"""
+    mirror, see https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "https://www.mathworks.com/products/matlab.html"
     manual_download = True
diff --git a/var/spack/repos/builtin/packages/mawk/package.py b/var/spack/repos/builtin/packages/mawk/package.py
index 4cbd322d77..ee5976fb6b 100644
--- a/var/spack/repos/builtin/packages/mawk/package.py
+++ b/var/spack/repos/builtin/packages/mawk/package.py
@@ -10,7 +10,7 @@ class Mawk(AutotoolsPackage):
     """mawk is an interpreter for the AWK Programming Language."""
 
     homepage = "https://invisible-island.net/mawk/mawk.html"
-    url      = "http://invisible-mirror.net/archives/mawk/mawk-1.3.4.tgz"
+    url      = "https://invisible-mirror.net/archives/mawk/mawk-1.3.4.tgz"
 
     version('1.3.4-20171017', sha256='db17115d1ed18ed1607c8b93291db9ccd4fe5e0f30d2928c3c5d127b23ec9e5b')
     version('1.3.4', sha256='2f2ab8831c441a5793ad333193c888c9ba29c900f009aa23c9fffc100c405925')
diff --git a/var/spack/repos/builtin/packages/megadock/package.py b/var/spack/repos/builtin/packages/megadock/package.py
index cdbf870136..aa54a65941 100644
--- a/var/spack/repos/builtin/packages/megadock/package.py
+++ b/var/spack/repos/builtin/packages/megadock/package.py
@@ -13,7 +13,7 @@ class Megadock(MakefilePackage, CudaPackage):
        heterogeneous supercomputers"""
 
     homepage = "https://www.bi.cs.titech.ac.jp/megadock/"
-    url      = "http://www.bi.cs.titech.ac.jp/megadock/archives/megadock-4.0.3.tgz"
+    url      = "https://www.bi.cs.titech.ac.jp/megadock/archives/megadock-4.0.3.tgz"
 
     version('4.0.3', sha256='c1409a411555f4f7b4eeeda81caf622d8a28259a599ea1d2181069c55f257664')
 
diff --git a/var/spack/repos/builtin/packages/meshkit/package.py b/var/spack/repos/builtin/packages/meshkit/package.py
index 17ac4379e1..4da9638c88 100644
--- a/var/spack/repos/builtin/packages/meshkit/package.py
+++ b/var/spack/repos/builtin/packages/meshkit/package.py
@@ -14,7 +14,7 @@ class Meshkit(AutotoolsPackage):
        other tools commonly needed to support mesh generation"""
 
     homepage = "https://sigma.mcs.anl.gov/meshkit-library"
-    url = "http://ftp.mcs.anl.gov/pub/fathom/meshkit-1.5.0.tar.gz"
+    url = "https://ftp.mcs.anl.gov/pub/fathom/meshkit-1.5.0.tar.gz"
 
     version('1.5.0',       sha256='6a4c119af191e24ef40644acb7cfbe967af0678ac3412f38a943fb28d661cac7')
 
diff --git a/var/spack/repos/builtin/packages/mfem/package.py b/var/spack/repos/builtin/packages/mfem/package.py
index 6d004447cd..6f51ee9dad 100644
--- a/var/spack/repos/builtin/packages/mfem/package.py
+++ b/var/spack/repos/builtin/packages/mfem/package.py
@@ -36,7 +36,7 @@ class Mfem(Package, CudaPackage, ROCmPackage):
     # 1. Verify that no checksums on old versions have changed.
     #
     # 2. Verify that the shortened URL for the new version is listed at:
-    #    http://mfem.org/download/
+    #    https://mfem.org/download/
     #
     # 3. Use http://getlinkinfo.com or similar to verify that the
     #    underling download link for the latest version comes has the
diff --git a/var/spack/repos/builtin/packages/migrate/package.py b/var/spack/repos/builtin/packages/migrate/package.py
index 408a5fefb6..508c588d83 100644
--- a/var/spack/repos/builtin/packages/migrate/package.py
+++ b/var/spack/repos/builtin/packages/migrate/package.py
@@ -12,7 +12,7 @@ class Migrate(AutotoolsPackage):
        migration rates and different subpopulation sizes"""
 
     homepage = "https://popgen.sc.fsu.edu/"
-    url      = "http://popgen.sc.fsu.edu/currentversions/migrate-3.6.11.src.tar.gz"
+    url      = "https://popgen.sc.fsu.edu/currentversions/migrate-3.6.11.src.tar.gz"
 
     version('3.6.11', sha256='a9ba06a4e995a45b8d04037f5f2da23e1fe64a2f3565189bdd50c62c6fe01fb8')
 
diff --git a/var/spack/repos/builtin/packages/minighost/package.py b/var/spack/repos/builtin/packages/minighost/package.py
index d1575d6c99..76944c2b29 100644
--- a/var/spack/repos/builtin/packages/minighost/package.py
+++ b/var/spack/repos/builtin/packages/minighost/package.py
@@ -16,7 +16,7 @@ class Minighost(MakefilePackage):
     """
 
     homepage = "https://mantevo.org"
-    url      = "http://downloads.mantevo.org/releaseTarballs/miniapps/MiniGhost/miniGhost_1.0.1.tar.gz"
+    url      = "https://downloads.mantevo.org/releaseTarballs/miniapps/MiniGhost/miniGhost_1.0.1.tar.gz"
 
     tags = ['proxy-app']
 
diff --git a/var/spack/repos/builtin/packages/minigmg/package.py b/var/spack/repos/builtin/packages/minigmg/package.py
index a6f9107fcb..262bc91eb1 100644
--- a/var/spack/repos/builtin/packages/minigmg/package.py
+++ b/var/spack/repos/builtin/packages/minigmg/package.py
@@ -20,7 +20,7 @@ class Minigmg(Package):
     Note, miniGMG code has been supersceded by HPGMG. """
 
     homepage = "http://crd.lbl.gov/departments/computer-science/PAR/research/previous-projects/miniGMG/"
-    url      = "http://crd.lbl.gov/assets/Uploads/FTG/Projects/miniGMG/miniGMG.tar.gz"
+    url      = "https://crd.lbl.gov/assets/Uploads/FTG/Projects/miniGMG/miniGMG.tar.gz"
 
     version('master', sha256='1c2d27496a881f655f5e849d6a7a132625e535739f82575991c511cc2cf899ac')
 
diff --git a/var/spack/repos/builtin/packages/minimd/package.py b/var/spack/repos/builtin/packages/minimd/package.py
index 2fe3209038..563f9627cf 100644
--- a/var/spack/repos/builtin/packages/minimd/package.py
+++ b/var/spack/repos/builtin/packages/minimd/package.py
@@ -12,7 +12,7 @@ class Minimd(MakefilePackage):
     """
 
     homepage = "https://mantevo.org"
-    url      = "http://downloads.mantevo.org/releaseTarballs/miniapps/MiniMD/miniMD_1.2.tgz"
+    url      = "https://downloads.mantevo.org/releaseTarballs/miniapps/MiniMD/miniMD_1.2.tgz"
 
     tags = ['proxy-app']
 
diff --git a/var/spack/repos/builtin/packages/minismac2d/package.py b/var/spack/repos/builtin/packages/minismac2d/package.py
index 40a61a2acb..a3828b2c47 100644
--- a/var/spack/repos/builtin/packages/minismac2d/package.py
+++ b/var/spack/repos/builtin/packages/minismac2d/package.py
@@ -14,7 +14,7 @@ class Minismac2d(MakefilePackage):
     """
 
     homepage = "https://mantevo.org"
-    url      = "http://downloads.mantevo.org/releaseTarballs/miniapps/MiniSMAC2D/miniSMAC2D-2.0.tgz"
+    url      = "https://downloads.mantevo.org/releaseTarballs/miniapps/MiniSMAC2D/miniSMAC2D-2.0.tgz"
 
     tags = ['proxy-app']
 
diff --git a/var/spack/repos/builtin/packages/minixyce/package.py b/var/spack/repos/builtin/packages/minixyce/package.py
index 6514ee3a57..48a2d25c24 100644
--- a/var/spack/repos/builtin/packages/minixyce/package.py
+++ b/var/spack/repos/builtin/packages/minixyce/package.py
@@ -13,7 +13,7 @@ class Minixyce(MakefilePackage):
     """
 
     homepage = "https://mantevo.org"
-    url      = "http://downloads.mantevo.org/releaseTarballs/miniapps/MiniXyce/miniXyce_1.0.tar.gz"
+    url      = "https://downloads.mantevo.org/releaseTarballs/miniapps/MiniXyce/miniXyce_1.0.tar.gz"
 
     tags = ['proxy-app']
 
diff --git a/var/spack/repos/builtin/packages/miranda/package.py b/var/spack/repos/builtin/packages/miranda/package.py
index 99aac453e9..ee05df09ae 100644
--- a/var/spack/repos/builtin/packages/miranda/package.py
+++ b/var/spack/repos/builtin/packages/miranda/package.py
@@ -10,7 +10,7 @@ class Miranda(AutotoolsPackage):
     """miRanda is an algorithm for finding genomic targets for microRNAs."""
 
     homepage = "http://www.microrna.org/microrna/getDownloads.do"
-    url      = "http://cbio.mskcc.org/microrna_data/miRanda-aug2010.tar.gz"
+    url      = "https://cbio.mskcc.org/microrna_data/miRanda-aug2010.tar.gz"
 
     version('3.3a', sha256='a671da562cf4636ef5085b27349df2df2f335774663fd423deb08f31212ec778',
-            url='http://cbio.mskcc.org/microrna_data/miRanda-aug2010.tar.gz')
+            url='https://cbio.mskcc.org/microrna_data/miRanda-aug2010.tar.gz')
diff --git a/var/spack/repos/builtin/packages/mmv/package.py b/var/spack/repos/builtin/packages/mmv/package.py
index 0f06df9028..b5c47f25bc 100644
--- a/var/spack/repos/builtin/packages/mmv/package.py
+++ b/var/spack/repos/builtin/packages/mmv/package.py
@@ -16,7 +16,7 @@ class Mmv(MakefilePackage):
     existing filenames or with other target names. """
 
     homepage = "https://packages.debian.org/source/buster/mmv"
-    url      = "http://deb.debian.org/debian/pool/main/m/mmv/mmv_1.01b.orig.tar.gz"
+    url      = "https://deb.debian.org/debian/pool/main/m/mmv/mmv_1.01b.orig.tar.gz"
 
     version('1.01b', sha256='0399c027ea1e51fd607266c1e33573866d4db89f64a74be8b4a1d2d1ff1fdeef')
 
diff --git a/var/spack/repos/builtin/packages/motif/package.py b/var/spack/repos/builtin/packages/motif/package.py
index 1118148178..f2c5eed5e9 100644
--- a/var/spack/repos/builtin/packages/motif/package.py
+++ b/var/spack/repos/builtin/packages/motif/package.py
@@ -14,7 +14,7 @@ class Motif(AutotoolsPackage):
     force_autoreconf = True
 
     homepage = "https://motif.ics.com/"
-    url = "http://cfhcable.dl.sourceforge.net/project/motif/Motif%202.3.8%20Source%20Code/motif-2.3.8.tar.gz"
+    url = "https://cfhcable.dl.sourceforge.net/project/motif/Motif%202.3.8%20Source%20Code/motif-2.3.8.tar.gz"
 
     version('2.3.8', sha256='859b723666eeac7df018209d66045c9853b50b4218cecadb794e2359619ebce7')
 
diff --git a/var/spack/repos/builtin/packages/mozjs/package.py b/var/spack/repos/builtin/packages/mozjs/package.py
index c219c36dce..9d41f73688 100644
--- a/var/spack/repos/builtin/packages/mozjs/package.py
+++ b/var/spack/repos/builtin/packages/mozjs/package.py
@@ -14,11 +14,11 @@ class Mozjs(AutotoolsPackage):
     homepage = "https://firefox-source-docs.mozilla.org/js/index.html"
 
     version('24.2.0', sha256='e62f3f331ddd90df1e238c09d61a505c516fe9fd8c5c95336611d191d18437d8',
-            url="http://ftp.mozilla.org/pub/js/mozjs-24.2.0.tar.bz2")
+            url="https://ftp.mozilla.org/pub/js/mozjs-24.2.0.tar.bz2")
     version('17.0.0', sha256='321e964fe9386785d3bf80870640f2fa1c683e32fe988eeb201b04471c172fba',
-            url="http://ftp.mozilla.org/pub/js/mozjs17.0.0.tar.gz")
+            url="https://ftp.mozilla.org/pub/js/mozjs17.0.0.tar.gz")
     version('1.8.5',  sha256='5d12f7e1f5b4a99436685d97b9b7b75f094d33580227aa998c406bbae6f2a687',
-            url="http://ftp.mozilla.org/pub/js/js185-1.0.0.tar.gz")
+            url="https://ftp.mozilla.org/pub/js/js185-1.0.0.tar.gz")
 
     depends_on('perl@5.6:', type='build')
     depends_on('pkgconfig', type='build')
diff --git a/var/spack/repos/builtin/packages/mpe2/package.py b/var/spack/repos/builtin/packages/mpe2/package.py
index 1e44f77264..e589275ccb 100644
--- a/var/spack/repos/builtin/packages/mpe2/package.py
+++ b/var/spack/repos/builtin/packages/mpe2/package.py
@@ -10,7 +10,7 @@ class Mpe2(AutotoolsPackage):
     """Message Passing Extensions (MPE): Parallel, shared X window graphics"""
 
     homepage = "https://www.mcs.anl.gov/research/projects/perfvis/software/MPE/"
-    url      = "http://ftp.mcs.anl.gov/pub/mpi/mpe/mpe2-1.3.0.tar.gz"
+    url      = "https://ftp.mcs.anl.gov/pub/mpi/mpe/mpe2-1.3.0.tar.gz"
 
     version('1.3.0', sha256='0faf32f9adab6fd882be30be913089ebf75272f8b5e4a012bb20c54abc21c0be')
 
diff --git a/var/spack/repos/builtin/packages/mpich/package.py b/var/spack/repos/builtin/packages/mpich/package.py
index a958701a6b..f8ee57aa0b 100644
--- a/var/spack/repos/builtin/packages/mpich/package.py
+++ b/var/spack/repos/builtin/packages/mpich/package.py
@@ -15,9 +15,9 @@ class Mpich(AutotoolsPackage):
     the Message Passing Interface (MPI) standard."""
 
     homepage = "https://www.mpich.org"
-    url      = "http://www.mpich.org/static/downloads/3.0.4/mpich-3.0.4.tar.gz"
+    url      = "https://www.mpich.org/static/downloads/3.0.4/mpich-3.0.4.tar.gz"
     git      = "https://github.com/pmodels/mpich.git"
-    list_url = "http://www.mpich.org/static/downloads/"
+    list_url = "https://www.mpich.org/static/downloads/"
     list_depth = 1
 
     maintainers = ['raffenet', 'yfguo']
diff --git a/var/spack/repos/builtin/packages/mpt/package.py b/var/spack/repos/builtin/packages/mpt/package.py
index 847edc0c38..9cef2ae05d 100644
--- a/var/spack/repos/builtin/packages/mpt/package.py
+++ b/var/spack/repos/builtin/packages/mpt/package.py
@@ -13,7 +13,7 @@ class Mpt(Package):
     Note: HPE MPI is proprietry software. Spack will search your
     current directory for the download file. Alternatively, add this file to a
     mirror so that Spack can find it. For instructions on how to set up a
-    mirror, see http://spack.readthedocs.io/en/latest/mirrors.html"""
+    mirror, see https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "https://buy.hpe.com/us/en/software/high-performance-computing-software/hpe-message-passing-interface-mpi/p/1010144155"
 
diff --git a/var/spack/repos/builtin/packages/mrnet/package.py b/var/spack/repos/builtin/packages/mrnet/package.py
index 931cbbc696..f957689243 100644
--- a/var/spack/repos/builtin/packages/mrnet/package.py
+++ b/var/spack/repos/builtin/packages/mrnet/package.py
@@ -10,7 +10,7 @@ class Mrnet(AutotoolsPackage):
     """The MRNet Multi-Cast Reduction Network."""
 
     homepage = "https://paradyn.org/mrnet"
-    url      = "http://ftp.cs.wisc.edu/pub/paradyn/mrnet/mrnet_5.0.1.tar.gz"
+    url      = "https://ftp.cs.wisc.edu/pub/paradyn/mrnet/mrnet_5.0.1.tar.gz"
     git      = "https://github.com/dyninst/mrnet.git"
     list_url = "http://ftp.cs.wisc.edu/paradyn/mrnet"
 
diff --git a/var/spack/repos/builtin/packages/mscgen/package.py b/var/spack/repos/builtin/packages/mscgen/package.py
index dddee92e84..4cc72f497f 100644
--- a/var/spack/repos/builtin/packages/mscgen/package.py
+++ b/var/spack/repos/builtin/packages/mscgen/package.py
@@ -13,7 +13,7 @@ class Mscgen(AutotoolsPackage):
     output."""
 
     homepage = "https://www.mcternan.me.uk/mscgen/"
-    url      = "http://www.mcternan.me.uk/mscgen/software/mscgen-src-0.20.tar.gz"
+    url      = "https://www.mcternan.me.uk/mscgen/software/mscgen-src-0.20.tar.gz"
 
     version('0.20', sha256='3c3481ae0599e1c2d30b7ed54ab45249127533ab2f20e768a0ae58d8551ddc23')
 
diff --git a/var/spack/repos/builtin/packages/mvapich2/package.py b/var/spack/repos/builtin/packages/mvapich2/package.py
index 92e5ea55db..af767b0496 100644
--- a/var/spack/repos/builtin/packages/mvapich2/package.py
+++ b/var/spack/repos/builtin/packages/mvapich2/package.py
@@ -14,8 +14,8 @@ class Mvapich2(AutotoolsPackage):
     platforms (x86 (Intel and AMD), ARM and OpenPOWER)"""
 
     homepage = "https://mvapich.cse.ohio-state.edu/userguide/userguide_spack/"
-    url = "http://mvapich.cse.ohio-state.edu/download/mvapich/mv2/mvapich2-2.3.6.tar.gz"
-    list_url = "http://mvapich.cse.ohio-state.edu/downloads/"
+    url = "https://mvapich.cse.ohio-state.edu/download/mvapich/mv2/mvapich2-2.3.6.tar.gz"
+    list_url = "https://mvapich.cse.ohio-state.edu/downloads/"
 
     maintainers = ['natshineman', 'harisubramoni', 'ndcontini']
 
diff --git a/var/spack/repos/builtin/packages/nauty/package.py b/var/spack/repos/builtin/packages/nauty/package.py
index 6a8156b04a..cc258339e4 100644
--- a/var/spack/repos/builtin/packages/nauty/package.py
+++ b/var/spack/repos/builtin/packages/nauty/package.py
@@ -13,7 +13,7 @@ class Nauty(AutotoolsPackage):
     """nauty and Traces are programs for computing automorphism groups of
     graphsq and digraphs"""
     homepage = "https://pallini.di.uniroma1.it/index.html"
-    url      = "http://pallini.di.uniroma1.it/nauty26r7.tar.gz"
+    url      = "https://pallini.di.uniroma1.it//nauty26r7.tar.gz"
 
     version('2.6r7', sha256='97b5648de17645895cbd56a9a0b3e23cf01f5332c476d013ea459f1a0363cdc6')
 
@@ -66,7 +66,7 @@ class Nauty(AutotoolsPackage):
         return self.spec.satisfies('@2.6r7')
 
     def url_for_version(self, version):
-        url = "http://pallini.di.uniroma1.it/nauty{0}.tar.gz"
+        url = "https://pallini.di.uniroma1.it//nauty{0}.tar.gz"
         return url.format(version.joined)
 
     def patch(self):
diff --git a/var/spack/repos/builtin/packages/ncbi-rmblastn/package.py b/var/spack/repos/builtin/packages/ncbi-rmblastn/package.py
index 702cd664ea..3aa0f00c65 100644
--- a/var/spack/repos/builtin/packages/ncbi-rmblastn/package.py
+++ b/var/spack/repos/builtin/packages/ncbi-rmblastn/package.py
@@ -16,20 +16,20 @@ class NcbiRmblastn(AutotoolsPackage):
     version('2.9.0', sha256='a390cc2d7a09422759fc178db84de9def822cbe485916bbb2ec0d215dacdc257')
 
     # There is a corresponding gzipped patch file associated with each version.
-    # According to the documentation, http://www.repeatmasker.org/RMBlast.html,
+    # According to the documentation, https://www.repeatmasker.org/RMBlast.html,
     # Download NCBI Blast+ and rmblast patch file:
     #   ncbi-blast-2.11.0+-src.tar.gz
     #   isb-2.11.0+-rmblast.patch.gz
     # The patch is downloaded and unzipped in the ncbi-rmblastn Spack package
     # directory to make it available for the patch directive.
     patch(
-        'http://www.repeatmasker.org/isb-2.11.0+-rmblast.patch.gz',
+        'https://www.repeatmasker.org/isb-2.11.0+-rmblast.patch.gz',
         sha256='ce985abd3512834adb9ad3e4078fbf9608a33a2ee6538a1e94b641490c92f899',
         archive_sha256='0fc27781c2ea2f17645247e2f3775b5d18c56f0b62761a865347be745ea4f6be',
         when='@2.11.0'
     )
     patch(
-        'http://www.repeatmasker.org/isb-2.9.0+-rmblast.patch.gz',
+        'https://www.repeatmasker.org/isb-2.9.0+-rmblast.patch.gz',
         sha256='ffa0845801aed11f4215b452532f3ff5b3dcb49ac8c14169568aaa585b9450ed',
         archive_sha256='e746ee480ade608052306fd21f015c8a323f27029f65399275216f9a4c882d59',
         when='@2.9.0'
diff --git a/var/spack/repos/builtin/packages/ncdu/package.py b/var/spack/repos/builtin/packages/ncdu/package.py
index bdb8829045..13f8d369c2 100644
--- a/var/spack/repos/builtin/packages/ncdu/package.py
+++ b/var/spack/repos/builtin/packages/ncdu/package.py
@@ -15,7 +15,7 @@ class Ncdu(Package):
     """
 
     homepage = "https://dev.yorhel.nl/ncdu"
-    url      = "http://dev.yorhel.nl/download/ncdu-1.11.tar.gz"
+    url      = "https://dev.yorhel.nl/download/ncdu-1.11.tar.gz"
 
     version('1.15.1', sha256='b02ddc4dbf1db139cc6fbbe2f54a282770380f0ca5c17089855eab52a9ea3fb0')
     version('1.14.2', sha256='947a7f5c1d0cd4e338e72b4f5bc5e2873651442cec3cb012e04ad2c37152c6b1')
diff --git a/var/spack/repos/builtin/packages/ncl/package.py b/var/spack/repos/builtin/packages/ncl/package.py
index 20ede8872e..a4bd503d07 100644
--- a/var/spack/repos/builtin/packages/ncl/package.py
+++ b/var/spack/repos/builtin/packages/ncl/package.py
@@ -95,7 +95,7 @@ class Ncl(Package):
     # triangle's features.
     resource(
         name='triangle',
-        url='http://www.netlib.org/voronoi/triangle.zip',
+        url='https://www.netlib.org/voronoi/triangle.zip',
         sha256='1766327add038495fa3499e9b7cc642179229750f7201b94f8e1b7bee76f8480',
         placement='triangle_src',
         when='+triangle')
diff --git a/var/spack/repos/builtin/packages/ndiff/package.py b/var/spack/repos/builtin/packages/ndiff/package.py
index 2397c8eb1c..145011cfe0 100644
--- a/var/spack/repos/builtin/packages/ndiff/package.py
+++ b/var/spack/repos/builtin/packages/ndiff/package.py
@@ -16,7 +16,7 @@ class Ndiff(Package):
     """
 
     homepage = "https://ftp.math.utah.edu/pub/ndiff/"
-    url      = "http://ftp.math.utah.edu/pub/ndiff/ndiff-2.00.tar.gz"
+    url      = "https://ftp.math.utah.edu/pub/ndiff/ndiff-2.00.tar.gz"
 
     version('2.00', sha256='f2bbd9a2c8ada7f4161b5e76ac5ebf9a2862cab099933167fe604b88f000ec2c')
     version('1.00', sha256='d4be3ab38e4b87da8d689fe47413e01a7bfdf8c8627bfb673aac37953a463a92')
diff --git a/var/spack/repos/builtin/packages/netcdf-cxx/package.py b/var/spack/repos/builtin/packages/netcdf-cxx/package.py
index 75932f46c3..f290a32b26 100644
--- a/var/spack/repos/builtin/packages/netcdf-cxx/package.py
+++ b/var/spack/repos/builtin/packages/netcdf-cxx/package.py
@@ -13,7 +13,7 @@ class NetcdfCxx(AutotoolsPackage):
     NetCDF C++ bindings, in Spack package netcdf-cxx4."""
 
     homepage = "https://www.unidata.ucar.edu/software/netcdf"
-    url      = "http://www.unidata.ucar.edu/downloads/netcdf/ftp/netcdf-cxx-4.2.tar.gz"
+    url      = "https://www.unidata.ucar.edu/downloads/netcdf/ftp/netcdf-cxx-4.2.tar.gz"
 
     version('4.2', sha256='95ed6ab49a0ee001255eac4e44aacb5ca4ea96ba850c08337a3e4c9a0872ccd1')
 
diff --git a/var/spack/repos/builtin/packages/netlib-lapack/package.py b/var/spack/repos/builtin/packages/netlib-lapack/package.py
index c47d33eb84..71135fc18b 100644
--- a/var/spack/repos/builtin/packages/netlib-lapack/package.py
+++ b/var/spack/repos/builtin/packages/netlib-lapack/package.py
@@ -15,14 +15,14 @@ class NetlibLapack(CMakePackage):
 
     """
     homepage = "https://www.netlib.org/lapack/"
-    url = "http://www.netlib.org/lapack/lapack-3.5.0.tgz"
+    url = "https://www.netlib.org/lapack/lapack-3.5.0.tgz"
 
     version('3.9.1', sha256='d0085d2caf997ff39299c05d4bacb6f3d27001d25a4cc613d48c1f352b73e7e0',
             url='https://github.com/Reference-LAPACK/lapack/archive/refs/tags/v3.9.1.tar.gz')
     version('3.9.0', sha256='106087f1bb5f46afdfba7f569d0cbe23dacb9a07cd24733765a0e89dbe1ad573',
             url='https://github.com/Reference-LAPACK/lapack/archive/v3.9.0.tar.gz')
     version('3.8.0', sha256='deb22cc4a6120bff72621155a9917f485f96ef8319ac074a7afbc68aab88bcf6',
-            url='http://www.netlib.org/lapack/lapack-3.8.0.tar.gz')
+            url='https://www.netlib.org/lapack/lapack-3.8.0.tar.gz')
     version('3.7.1', sha256='f6c53fd9f56932f3ddb3d5e24c1c07e4cd9b3b08e7f89de9c867125eecc9a1c8')
     version('3.7.0', sha256='ed967e4307e986474ab02eb810eed1d1adc73f5e1e3bc78fb009f6fe766db3be')
     version('3.6.1', sha256='888a50d787a9d828074db581c80b2d22bdb91435a673b1bf6cd6eb51aa50d1de')
diff --git a/var/spack/repos/builtin/packages/netlib-scalapack/package.py b/var/spack/repos/builtin/packages/netlib-scalapack/package.py
index 6227c84cae..2605deaadd 100644
--- a/var/spack/repos/builtin/packages/netlib-scalapack/package.py
+++ b/var/spack/repos/builtin/packages/netlib-scalapack/package.py
@@ -106,7 +106,7 @@ class NetlibScalapack(ScalapackBase):
     """
 
     homepage = "https://www.netlib.org/scalapack/"
-    url = "http://www.netlib.org/scalapack/scalapack-2.0.2.tgz"
+    url = "https://www.netlib.org/scalapack/scalapack-2.0.2.tgz"
 
     version('2.1.0', sha256='61d9216cf81d246944720cfce96255878a3f85dec13b9351f1fa0fd6768220a6')
     version('2.0.2', sha256='0c74aeae690fe5ee4db7926f49c5d0bb69ce09eea75beb915e00bba07530395c')
diff --git a/var/spack/repos/builtin/packages/netlib-xblas/package.py b/var/spack/repos/builtin/packages/netlib-xblas/package.py
index b515ae1e51..571140599b 100644
--- a/var/spack/repos/builtin/packages/netlib-xblas/package.py
+++ b/var/spack/repos/builtin/packages/netlib-xblas/package.py
@@ -21,7 +21,7 @@ class NetlibXblas(AutotoolsPackage):
        straightforward but careful code written by hand."""
 
     homepage = "https://www.netlib.org/xblas"
-    url      = "http://www.netlib.org/xblas/xblas.tar.gz"
+    url      = "https://www.netlib.org/xblas/xblas.tar.gz"
 
     version('1.0.248', sha256='b5fe7c71c2da1ed9bcdc5784a12c5fa9fb417577513fe8a38de5de0007f7aaa1')
 
diff --git a/var/spack/repos/builtin/packages/netpbm/package.py b/var/spack/repos/builtin/packages/netpbm/package.py
index 7096ac1e12..29a821276a 100644
--- a/var/spack/repos/builtin/packages/netpbm/package.py
+++ b/var/spack/repos/builtin/packages/netpbm/package.py
@@ -120,9 +120,9 @@ class Netpbm(MakefilePackage):
             if 'platform=darwin' in spec:
                 # https://github.com/macports/macports-ports/blob/master/graphics/netpbm/Portfile
                 cflags.append('-D_DARWIN_C_SOURCE')
-                # http://www.linuxquestions.org/questions/linux-from-scratch-13/can't-compile-luit-xorg-applications-4175476308/
+                # https://www.linuxquestions.org/questions/linux-from-scratch-13/can't-compile-luit-xorg-applications-4175476308/
                 # cflags.append('-U_XOPEN_SOURCE')
-                # http://www.mistys-internet.website/blog/blog/2013/10/19/no-cpp-precomp-the-compiler-flag-that-time-forgot/
+                # https://www.mistys-internet.website/blog/blog/2013/10/19/no-cpp-precomp-the-compiler-flag-that-time-forgot/
                 # cflags.append('-no-cpp-precomp')
             config.append('CFLAGS = {0}'.format(' '.join(cflags)))
             config.append('CFLAGS_SHLIB += -fno-common')
diff --git a/var/spack/repos/builtin/packages/npm/package.py b/var/spack/repos/builtin/packages/npm/package.py
index f065bb3346..79aec470d2 100644
--- a/var/spack/repos/builtin/packages/npm/package.py
+++ b/var/spack/repos/builtin/packages/npm/package.py
@@ -14,7 +14,7 @@ class Npm(Package):
     """npm: A package manager for javascript."""
 
     homepage = "https://github.com/npm/cli"
-    # base http://www.npmjs.com/
+    # base https://www.npmjs.com/
     url      = "https://registry.npmjs.org/npm/-/npm-6.13.4.tgz"
 
     version('6.14.9', sha256='1e0e880ce0d5adf0120fb3f92fc8e5ea5bac73681d37282615d074ff670f7703')
diff --git a/var/spack/repos/builtin/packages/numdiff/package.py b/var/spack/repos/builtin/packages/numdiff/package.py
index 19fb8c4bfc..4a693e1dd5 100644
--- a/var/spack/repos/builtin/packages/numdiff/package.py
+++ b/var/spack/repos/builtin/packages/numdiff/package.py
@@ -12,7 +12,7 @@ class Numdiff(AutotoolsPackage):
     differences or/and different numeric formats."""
 
     homepage  = 'https://www.nongnu.org/numdiff'
-    url       = 'http://nongnu.askapache.com/numdiff/numdiff-5.8.1.tar.gz'
+    url       = 'https://nongnu.askapache.com/numdiff/numdiff-5.8.1.tar.gz'
 
     version('5.9.0', sha256='87284a117944723eebbf077f857a0a114d818f8b5b54d289d59e73581194f5ef')
     version('5.8.1', sha256='99aebaadf63325f5658411c09c6dde60d2990c5f9a24a51a6851cb574a4af503')
diff --git a/var/spack/repos/builtin/packages/nwchem/package.py b/var/spack/repos/builtin/packages/nwchem/package.py
index e3aec20626..1ce1846834 100644
--- a/var/spack/repos/builtin/packages/nwchem/package.py
+++ b/var/spack/repos/builtin/packages/nwchem/package.py
@@ -97,8 +97,8 @@ class Nwchem(Package):
             make(*args)
 
             #  need to install by hand. Follow Ubuntu:
-            #  http://packages.ubuntu.com/trusty/all/nwchem-data/filelist
-            #  http://packages.ubuntu.com/trusty/amd64/nwchem/filelist
+            #  https://packages.ubuntu.com/trusty/all/nwchem-data/filelist
+            #  https://packages.ubuntu.com/trusty/amd64/nwchem/filelist
             share_path = join_path(prefix, 'share', 'nwchem')
             mkdirp(prefix.bin)
 
diff --git a/var/spack/repos/builtin/packages/oce/package.py b/var/spack/repos/builtin/packages/oce/package.py
index fe9ab5569c..d092d51355 100644
--- a/var/spack/repos/builtin/packages/oce/package.py
+++ b/var/spack/repos/builtin/packages/oce/package.py
@@ -38,7 +38,7 @@ class Oce(Package):
     # There is a bug in OCE which appears with Clang (version?) or GCC 6.0
     # and has to do with compiler optimization, see
     # https://github.com/tpaviot/oce/issues/576
-    # http://tracker.dev.opencascade.org/view.php?id=26042
+    # https://tracker.dev.opencascade.org/view.php?id=26042
     # https://github.com/tpaviot/oce/issues/605
     # https://github.com/tpaviot/oce/commit/61cb965b9ffeca419005bc15e635e67589c421dd.patch
     patch('null.patch', when='@0.16:0.17.1')
diff --git a/var/spack/repos/builtin/packages/oclint/package.py b/var/spack/repos/builtin/packages/oclint/package.py
index 19bb29c34b..5c2e39cecd 100644
--- a/var/spack/repos/builtin/packages/oclint/package.py
+++ b/var/spack/repos/builtin/packages/oclint/package.py
@@ -34,7 +34,7 @@ class Oclint(Package):
 
     def install(self, spec, prefix):
         # Build from source via directions from
-        # http://docs.oclint.org/en/stable/intro/build.html,
+        # https://docs.oclint.org/en/stable/intro/build.html,
         cd('oclint-scripts')
 
         # ...but instead of using oclint-scripts/make, execute the
diff --git a/var/spack/repos/builtin/packages/ompss/package.py b/var/spack/repos/builtin/packages/ompss/package.py
index 96a946eab5..0c428942e3 100644
--- a/var/spack/repos/builtin/packages/ompss/package.py
+++ b/var/spack/repos/builtin/packages/ompss/package.py
@@ -22,7 +22,7 @@ class Ompss(Package):
     """
     homepage = "https://pm.bsc.es/"
     url      = "http://pm.bsc.es/sites/default/files/ftp/ompss/releases/ompss-14.10.tar.gz"
-    list_url = 'http://pm.bsc.es/ompss-downloads'
+    list_url = 'https://pm.bsc.es/ompss-downloads'
 
     version('14.10', sha256='5b38d3e6ce108e7ca73a2599bc698d75ea9f6d90a3be0349faf6d61022e62a38')
 
diff --git a/var/spack/repos/builtin/packages/opencascade/package.py b/var/spack/repos/builtin/packages/opencascade/package.py
index 41155c3634..f18689bdaa 100644
--- a/var/spack/repos/builtin/packages/opencascade/package.py
+++ b/var/spack/repos/builtin/packages/opencascade/package.py
@@ -48,7 +48,7 @@ class Opencascade(CMakePackage):
     depends_on('gl')
 
     def url_for_version(self, version):
-        url = "http://git.dev.opencascade.org/gitweb/?p=occt.git;a=snapshot;h=refs/tags/V{0};sf=tgz"
+        url = "https://git.dev.opencascade.org/gitweb/?p=occt.git;a=snapshot;h=refs/tags/V{0};sf=tgz"
         return url.format(version.underscored)
 
     def cmake_args(self):
diff --git a/var/spack/repos/builtin/packages/openldap/package.py b/var/spack/repos/builtin/packages/openldap/package.py
index e7724a7aa4..7591a3d4b6 100644
--- a/var/spack/repos/builtin/packages/openldap/package.py
+++ b/var/spack/repos/builtin/packages/openldap/package.py
@@ -43,7 +43,7 @@ class Openldap(AutotoolsPackage):
     # depends_on('Pth', when='~client_only') # not avail. in spack yet
     depends_on('perl', when='~client_only+perl')  # for slapd
 
-    # Ref: http://www.linuxfromscratch.org/blfs/view/svn/server/openldap.html
+    # Ref: https://www.linuxfromscratch.org/blfs/view/svn/server/openldap.html
     @when('+client_only')
     def configure_args(self):
         return ['CPPFLAGS=-D_GNU_SOURCE',
diff --git a/var/spack/repos/builtin/packages/openmx/package.py b/var/spack/repos/builtin/packages/openmx/package.py
index f6a313c27b..50fcb23a2b 100644
--- a/var/spack/repos/builtin/packages/openmx/package.py
+++ b/var/spack/repos/builtin/packages/openmx/package.py
@@ -11,7 +11,7 @@ class Openmx(MakefilePackage):
        localized basis functions."""
 
     homepage = "http://www.openmx-square.org/index.html"
-    url      = "http://t-ozaki.issp.u-tokyo.ac.jp/openmx3.8.tar.gz"
+    url      = "https://t-ozaki.issp.u-tokyo.ac.jp/openmx3.8.tar.gz"
 
     version('3.8', sha256='36ee10d8b1587b25a2ca1d57f110111be65c4fb4dc820e6d93e1ed2b562634a1')
 
diff --git a/var/spack/repos/builtin/packages/openssl/package.py b/var/spack/repos/builtin/packages/openssl/package.py
index 2a549ec73c..5c434ef32d 100644
--- a/var/spack/repos/builtin/packages/openssl/package.py
+++ b/var/spack/repos/builtin/packages/openssl/package.py
@@ -19,8 +19,8 @@ class Openssl(Package):   # Uses Fake Autotools, should subclass Package
     homepage = "https://www.openssl.org"
 
     # URL must remain http:// so Spack can bootstrap curl
-    url = "http://www.openssl.org/source/openssl-1.1.1d.tar.gz"
-    list_url = "http://www.openssl.org/source/old/"
+    url = "https://www.openssl.org/source/openssl-1.1.1d.tar.gz"
+    list_url = "https://www.openssl.org/source/old/"
     list_depth = 1
 
     executables = ['openssl']
diff --git a/var/spack/repos/builtin/packages/orca/package.py b/var/spack/repos/builtin/packages/orca/package.py
index 18d6d2692d..3c35441963 100644
--- a/var/spack/repos/builtin/packages/orca/package.py
+++ b/var/spack/repos/builtin/packages/orca/package.py
@@ -15,7 +15,7 @@ class Orca(Package):
        on the Orca homepage and download Orca yourself. Spack will search
        your current directory for the download file. Alternatively, add this
        file to a mirror so that Spack can find it. For instructions on how to
-       set up a mirror, see http://spack.readthedocs.io/en/latest/mirrors.html"""
+       set up a mirror, see https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "https://cec.mpg.de"
     url      = "file://{0}/orca_4_0_1_2_linux_x86-64_openmpi202.tar.zst".format(os.getcwd())
diff --git a/var/spack/repos/builtin/packages/orthomcl/package.py b/var/spack/repos/builtin/packages/orthomcl/package.py
index b3cd6ef889..177a275259 100644
--- a/var/spack/repos/builtin/packages/orthomcl/package.py
+++ b/var/spack/repos/builtin/packages/orthomcl/package.py
@@ -11,7 +11,7 @@ class Orthomcl(Package):
        sequences."""
 
     homepage = "https://orthomcl.org/orthomcl/"
-    url      = "http://orthomcl.org/common/downloads/software/v2.0/orthomclSoftware-v2.0.9.tar.gz"
+    url      = "https://orthomcl.org/common/downloads/software/v2.0/orthomclSoftware-v2.0.9.tar.gz"
 
     version('2.0.9', sha256='5f96d23ff255778535c4926d75b19f059db0c01be1ac599289d2431115d68640')
 
diff --git a/var/spack/repos/builtin/packages/ossp-uuid/package.py b/var/spack/repos/builtin/packages/ossp-uuid/package.py
index b01319e8f0..ff23ec92bf 100644
--- a/var/spack/repos/builtin/packages/ossp-uuid/package.py
+++ b/var/spack/repos/builtin/packages/ossp-uuid/package.py
@@ -13,7 +13,7 @@ class OsspUuid(AutotoolsPackage):
     (UUID)."""
 
     homepage = "http://www.ossp.org/pkg/lib/uuid"
-    url = "http://www.mirrorservice.org/sites/ftp.ossp.org/pkg/lib/uuid/uuid-1.6.2.tar.gz"
+    url = "https://www.mirrorservice.org/sites/ftp.ossp.org/pkg/lib/uuid/uuid-1.6.2.tar.gz"
 
     version('1.6.2', sha256='11a615225baa5f8bb686824423f50e4427acd3f70d394765bdff32801f0fd5b0')
 
diff --git a/var/spack/repos/builtin/packages/osu-micro-benchmarks/package.py b/var/spack/repos/builtin/packages/osu-micro-benchmarks/package.py
index 9faf3ec533..3c08f36095 100644
--- a/var/spack/repos/builtin/packages/osu-micro-benchmarks/package.py
+++ b/var/spack/repos/builtin/packages/osu-micro-benchmarks/package.py
@@ -16,7 +16,7 @@ class OsuMicroBenchmarks(AutotoolsPackage):
     and can be used for both traditional and GPU-enhanced nodes."""
 
     homepage = "https://mvapich.cse.ohio-state.edu/benchmarks/"
-    url      = "http://mvapich.cse.ohio-state.edu/download/mvapich/osu-micro-benchmarks-5.6.3.tar.gz"
+    url      = "https://mvapich.cse.ohio-state.edu/download/mvapich/osu-micro-benchmarks-5.6.3.tar.gz"
 
     version('5.7.1', sha256='cb5ce4e2e68ed012d9952e96ef880a802058c87a1d840a2093b19bddc7faa165')
     version('5.7',   sha256='1470ebe00eb6ca7f160b2c1efda57ca0fb26b5c4c61148a3f17e8e79fbf34590')
diff --git a/var/spack/repos/builtin/packages/otf/package.py b/var/spack/repos/builtin/packages/otf/package.py
index 2524243156..7af02cdfdf 100644
--- a/var/spack/repos/builtin/packages/otf/package.py
+++ b/var/spack/repos/builtin/packages/otf/package.py
@@ -12,7 +12,7 @@ class Otf(AutotoolsPackage):
        successor format to the Vampir Trace Format (VTF3)."""
 
     homepage = "http://tu-dresden.de/die_tu_dresden/zentrale_einrichtungen/zih/forschung/projekte/otf/index_html/document_view?set_language=en"
-    url      = "http://wwwpub.zih.tu-dresden.de/%7Emlieber/dcount/dcount.php?package=otf&get=OTF-1.12.5salmon.tar.gz"
+    url      = "https://wwwpub.zih.tu-dresden.de/%7Emlieber/dcount/dcount.php?package=otf&get=OTF-1.12.5salmon.tar.gz"
 
     version('1.12.5salmon', sha256='0a8427360dedb38e8ddca30f14d95f826420c550337c5a79dbb754904e194088')
 
diff --git a/var/spack/repos/builtin/packages/papi/package.py b/var/spack/repos/builtin/packages/papi/package.py
index f7a4e40e80..700ba9e21d 100644
--- a/var/spack/repos/builtin/packages/papi/package.py
+++ b/var/spack/repos/builtin/packages/papi/package.py
@@ -22,7 +22,7 @@ class Papi(AutotoolsPackage):
     homepage = "https://icl.cs.utk.edu/papi/index.html"
     maintainers = ['G-Ragghianti']
 
-    url = "http://icl.cs.utk.edu/projects/papi/downloads/papi-5.4.1.tar.gz"
+    url = "https://icl.cs.utk.edu/projects/papi/downloads/papi-5.4.1.tar.gz"
     git = "https://bitbucket.org/icl/papi/src/master/"
 
     version('master', branch='master')
diff --git a/var/spack/repos/builtin/packages/pathfinder/package.py b/var/spack/repos/builtin/packages/pathfinder/package.py
index 22b0659918..3304dae50b 100644
--- a/var/spack/repos/builtin/packages/pathfinder/package.py
+++ b/var/spack/repos/builtin/packages/pathfinder/package.py
@@ -11,7 +11,7 @@ class Pathfinder(MakefilePackage):
     """Proxy Application. Signature search."""
 
     homepage = "https://mantevo.org/packages/"
-    url      = "http://downloads.mantevo.org/releaseTarballs/miniapps/PathFinder/PathFinder_1.0.0.tgz"
+    url      = "https://downloads.mantevo.org/releaseTarballs/miniapps/PathFinder/PathFinder_1.0.0.tgz"
 
     tags = ['proxy-app']
 
diff --git a/var/spack/repos/builtin/packages/pdt/package.py b/var/spack/repos/builtin/packages/pdt/package.py
index e5c3c4c1ed..f643b81f60 100644
--- a/var/spack/repos/builtin/packages/pdt/package.py
+++ b/var/spack/repos/builtin/packages/pdt/package.py
@@ -19,7 +19,7 @@ class Pdt(AutotoolsPackage):
     """
     maintainers = ['wspear', 'eugeneswalker', 'khuck', 'sameershende']
     homepage = "https://www.cs.uoregon.edu/research/pdt/home.php"
-    url      = "http://www.cs.uoregon.edu/research/paracomp/pdtoolkit/Download/pdtoolkit-3.25.1.tar.gz"
+    url      = "https://www.cs.uoregon.edu/research/paracomp/pdtoolkit/Download/pdtoolkit-3.25.1.tar.gz"
 
     version('3.25.1', sha256='0b6f8a6b8769c181b2ae6cae7298f04b8e3e3d68066f598ed24574e19500bc97')
     version('3.25', sha256='1037628d854edfeded3d847150d3e8fbd3774e8146407ce32f5021c80f6299be')
diff --git a/var/spack/repos/builtin/packages/perl-alien-svn/package.py b/var/spack/repos/builtin/packages/perl-alien-svn/package.py
index a657988876..47fe0e112c 100644
--- a/var/spack/repos/builtin/packages/perl-alien-svn/package.py
+++ b/var/spack/repos/builtin/packages/perl-alien-svn/package.py
@@ -12,7 +12,7 @@ class PerlAlienSvn(PerlPackage):
     """Perl SVN extension."""
 
     homepage = "http://metacpan.org/source/MSCHWERN/Alien-SVN-v1.8.11.0"
-    url      = "http://cpan.metacpan.org/authors/id/M/MS/MSCHWERN/Alien-SVN-v1.8.11.0.tar.gz"
+    url      = "https://cpan.metacpan.org/authors/id/M/MS/MSCHWERN/Alien-SVN-v1.8.11.0.tar.gz"
 
     version('1.8.11.0', sha256='acf8ebce1cb6958ef24611a453abee32b8e4dfe767563834362891ef3f30fc68')
     version('1.7.19.0', sha256='80df1eef9ffb7b0fb0c45285eec05d15bcb45c349c441f97131c64b8697dceb0')
diff --git a/var/spack/repos/builtin/packages/perl-bioperl/package.py b/var/spack/repos/builtin/packages/perl-bioperl/package.py
index 00ee4af03e..f5fbab7458 100644
--- a/var/spack/repos/builtin/packages/perl-bioperl/package.py
+++ b/var/spack/repos/builtin/packages/perl-bioperl/package.py
@@ -28,7 +28,7 @@ class PerlBioperl(PerlPackage):
     The intent of the BioPerl development effort is to make reusable tools that
     aid people in creating their own sites or job-specific applications.
 
-    The BioPerl website at http://bioperl.org also attempts to maintain links
+    The BioPerl website at https://bioperl.org/ also attempts to maintain links
     and archives of standalone bio-related Perl tools that are not affiliated
     or related to the core BioPerl effort. Check the site for useful code ideas
     and contribute your own if possible."""
diff --git a/var/spack/repos/builtin/packages/perl-moose/package.py b/var/spack/repos/builtin/packages/perl-moose/package.py
index fa0885bb2f..e3cba086b3 100644
--- a/var/spack/repos/builtin/packages/perl-moose/package.py
+++ b/var/spack/repos/builtin/packages/perl-moose/package.py
@@ -10,7 +10,7 @@ class PerlMoose(PerlPackage):
     """A postmodern object system for Perl 5"""
 
     homepage = "https://metacpan.org/pod/Moose"
-    url      = "http://search.cpan.org/CPAN/authors/id/E/ET/ETHER/Moose-2.2006.tar.gz"
+    url      = "https://search.cpan.org/CPAN/authors/id/E/ET/ETHER/Moose-2.2006.tar.gz"
 
     version('2.2010', sha256='af0905b69f18c27de1177c9bc7778ee495d4ec91be1f223e8ca8333af4de08c5')
     version('2.2009', sha256='63ba8a5e27dbcbdbac2cd8f4162fff50a31e9829d8955a196a5898240c02d194')
diff --git a/var/spack/repos/builtin/packages/perl-termreadkey/package.py b/var/spack/repos/builtin/packages/perl-termreadkey/package.py
index 92f2018173..6891fa88aa 100644
--- a/var/spack/repos/builtin/packages/perl-termreadkey/package.py
+++ b/var/spack/repos/builtin/packages/perl-termreadkey/package.py
@@ -16,7 +16,7 @@ class PerlTermreadkey(PerlPackage):
     working."""
 
     homepage = "https://metacpan.org/pod/Term::ReadKey"
-    url = "http://www.cpan.org/authors/id/J/JS/JSTOWE/TermReadKey-2.37.tar.gz"
+    url = "https://www.cpan.org/authors/id/J/JS/JSTOWE/TermReadKey-2.37.tar.gz"
 
     version('2.38', sha256='5a645878dc570ac33661581fbb090ff24ebce17d43ea53fd22e105a856a47290')
     version('2.37', sha256='4a9383cf2e0e0194668fe2bd546e894ffad41d556b41d2f2f577c8db682db241')
diff --git a/var/spack/repos/builtin/packages/perl-test-needs/package.py b/var/spack/repos/builtin/packages/perl-test-needs/package.py
index 9b27efef23..28558cb850 100644
--- a/var/spack/repos/builtin/packages/perl-test-needs/package.py
+++ b/var/spack/repos/builtin/packages/perl-test-needs/package.py
@@ -10,6 +10,6 @@ class PerlTestNeeds(PerlPackage):
     """Skip tests when modules not available."""
 
     homepage = "https://metacpan.org/pod/Test::Needs"
-    url      = "http://search.cpan.org/CPAN/authors/id/H/HA/HAARG/Test-Needs-0.002005.tar.gz"
+    url      = "https://search.cpan.org/CPAN/authors/id/H/HA/HAARG/Test-Needs-0.002005.tar.gz"
 
     version('0.002005', sha256='5a4f33983586edacdbe00a3b429a9834190140190dab28d0f873c394eb7df399')
diff --git a/var/spack/repos/builtin/packages/perl/package.py b/var/spack/repos/builtin/packages/perl/package.py
index 670bc0f626..be0cd770a4 100644
--- a/var/spack/repos/builtin/packages/perl/package.py
+++ b/var/spack/repos/builtin/packages/perl/package.py
@@ -30,7 +30,7 @@ class Perl(Package):  # Perl doesn't use Autotools, it should subclass Package
 
     executables = [r'^perl(-?\d+.*)?$']
 
-    # see http://www.cpan.org/src/README.html for
+    # see https://www.cpan.org/src/README.html for
     # explanation of version numbering scheme
 
     # Development releases (odd numbers)
diff --git a/var/spack/repos/builtin/packages/petsc/package.py b/var/spack/repos/builtin/packages/petsc/package.py
index 683420b883..0d3db7e8cf 100644
--- a/var/spack/repos/builtin/packages/petsc/package.py
+++ b/var/spack/repos/builtin/packages/petsc/package.py
@@ -12,7 +12,7 @@ class Petsc(Package, CudaPackage, ROCmPackage):
     """
 
     homepage = "https://www.mcs.anl.gov/petsc/index.html"
-    url = "http://ftp.mcs.anl.gov/pub/petsc/release-snapshots/petsc-3.15.0.tar.gz"
+    url = "https://ftp.mcs.anl.gov/pub/petsc/release-snapshots/petsc-3.15.0.tar.gz"
     git = "https://gitlab.com/petsc/petsc.git"
     maintainers = ['balay', 'barrysmith', 'jedbrown']
 
diff --git a/var/spack/repos/builtin/packages/pgi/package.py b/var/spack/repos/builtin/packages/pgi/package.py
index 2f0f8a4712..fefbfec885 100644
--- a/var/spack/repos/builtin/packages/pgi/package.py
+++ b/var/spack/repos/builtin/packages/pgi/package.py
@@ -17,7 +17,7 @@ class Pgi(Package):
     account on the PGI homepage and download PGI yourself. Spack will search
     your current directory for the download tarball. Alternatively, add this
     file to a mirror so that Spack can find it. For instructions on how to
-    set up a mirror, see http://spack.readthedocs.io/en/latest/mirrors.html"""
+    set up a mirror, see https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "https://www.pgroup.com/"
     manual_download = True
diff --git a/var/spack/repos/builtin/packages/photos/package.py b/var/spack/repos/builtin/packages/photos/package.py
index d014b08153..94e6d46232 100644
--- a/var/spack/repos/builtin/packages/photos/package.py
+++ b/var/spack/repos/builtin/packages/photos/package.py
@@ -11,7 +11,7 @@ class Photos(AutotoolsPackage):
          of particles and resonances."""
 
     homepage = "https://photospp.web.cern.ch/photospp/"
-    url      = "http://photospp.web.cern.ch/photospp/resources/PHOTOS.3.61/PHOTOS.3.61-LHC.tar.gz"
+    url      = "https://photospp.web.cern.ch/photospp/resources/PHOTOS.3.61/PHOTOS.3.61-LHC.tar.gz"
 
     tags = ['hep']
 
diff --git a/var/spack/repos/builtin/packages/phylip/package.py b/var/spack/repos/builtin/packages/phylip/package.py
index 6988522201..473a19de2e 100644
--- a/var/spack/repos/builtin/packages/phylip/package.py
+++ b/var/spack/repos/builtin/packages/phylip/package.py
@@ -11,7 +11,7 @@ class Phylip(Package):
        inferring phylogenies (evolutionary trees)."""
 
     homepage = "https://evolution.genetics.washington.edu/phylip/"
-    url      = "http://evolution.gs.washington.edu/phylip/download/phylip-3.697.tar.gz"
+    url      = "https://evolution.gs.washington.edu/phylip/download/phylip-3.697.tar.gz"
 
     version('3.697', sha256='9a26d8b08b8afea7f708509ef41df484003101eaf4beceb5cf7851eb940510c1')
 
diff --git a/var/spack/repos/builtin/packages/pig/package.py b/var/spack/repos/builtin/packages/pig/package.py
index 6af9c1e3c1..6872c8286c 100644
--- a/var/spack/repos/builtin/packages/pig/package.py
+++ b/var/spack/repos/builtin/packages/pig/package.py
@@ -15,7 +15,7 @@ class Pig(Package):
     """
 
     homepage = "https://archive.apache.org"
-    url      = "http://archive.apache.org/dist/hadoop/pig/stable/pig-0.7.0.tar.gz"
+    url      = "https://archive.apache.org/dist/hadoop/pig/stable/pig-0.7.0.tar.gz"
 
     version('0.7.0', sha256='fa7211fb339f547f679a3dd90055f1ddc45d5754d88463e4cc39c380ddf8b02a')
 
diff --git a/var/spack/repos/builtin/packages/pixman/package.py b/var/spack/repos/builtin/packages/pixman/package.py
index 7d3e46783e..52deba5f4d 100644
--- a/var/spack/repos/builtin/packages/pixman/package.py
+++ b/var/spack/repos/builtin/packages/pixman/package.py
@@ -14,7 +14,7 @@ class Pixman(AutotoolsPackage):
     trapezoid rasterization."""
 
     homepage = "http://www.pixman.org"
-    url      = "http://cairographics.org/releases/pixman-0.32.6.tar.gz"
+    url      = "https://cairographics.org/releases/pixman-0.32.6.tar.gz"
 
     version('0.40.0', sha256='6d200dec3740d9ec4ec8d1180e25779c00bc749f94278c8b9021f5534db223fc')
     version('0.38.4', sha256='da66d6fd6e40aee70f7bd02e4f8f76fc3f006ec879d346bae6a723025cfbdde7')
diff --git a/var/spack/repos/builtin/packages/pkg-config/package.py b/var/spack/repos/builtin/packages/pkg-config/package.py
index f8e0c85e2a..2bcb676967 100644
--- a/var/spack/repos/builtin/packages/pkg-config/package.py
+++ b/var/spack/repos/builtin/packages/pkg-config/package.py
@@ -12,7 +12,7 @@ class PkgConfig(AutotoolsPackage):
 
     homepage = "https://www.freedesktop.org/wiki/Software/pkg-config/"
     # URL must remain http:// so Spack can bootstrap curl
-    url = "http://pkgconfig.freedesktop.org/releases/pkg-config-0.29.2.tar.gz"
+    url = "https://pkgconfig.freedesktop.org/releases/pkg-config-0.29.2.tar.gz"
 
     version('0.29.2', sha256='6fc69c01688c9458a57eb9a1664c9aba372ccda420a02bf4429fe610e7e7d591')
     version('0.29.1', sha256='beb43c9e064555469bd4390dcfd8030b1536e0aa103f08d7abf7ae8cac0cb001')
diff --git a/var/spack/repos/builtin/packages/pkgconf/package.py b/var/spack/repos/builtin/packages/pkgconf/package.py
index 1523cd19aa..c618722e6d 100644
--- a/var/spack/repos/builtin/packages/pkgconf/package.py
+++ b/var/spack/repos/builtin/packages/pkgconf/package.py
@@ -14,7 +14,7 @@ class Pkgconf(AutotoolsPackage):
 
     homepage = "http://pkgconf.org/"
     # URL must remain http:// so Spack can bootstrap curl
-    url      = "http://distfiles.dereferenced.org/pkgconf/pkgconf-1.6.3.tar.xz"
+    url      = "https://distfiles.dereferenced.org/pkgconf/pkgconf-1.6.3.tar.xz"
 
     version('1.8.0', sha256='ef9c7e61822b7cb8356e6e9e1dca58d9556f3200d78acab35e4347e9d4c2bbaf')
     version('1.7.4',  sha256='d73f32c248a4591139a6b17777c80d4deab6b414ec2b3d21d0a24be348c476ab')
diff --git a/var/spack/repos/builtin/packages/planck-likelihood/package.py b/var/spack/repos/builtin/packages/planck-likelihood/package.py
index 5079e7a3aa..c012466731 100644
--- a/var/spack/repos/builtin/packages/planck-likelihood/package.py
+++ b/var/spack/repos/builtin/packages/planck-likelihood/package.py
@@ -11,10 +11,10 @@ class PlanckLikelihood(Package):
     """2015 Cosmic Microwave Background (CMB) spectra and likelihood code"""
 
     homepage = "https://wiki.cosmos.esa.int/planckpla2015/index.php/CMB_spectrum_%26_Likelihood_Code"
-    url      = "http://irsa.ipac.caltech.edu/data/Planck/release_2/software/COM_Likelihood_Code-v2.0.R2.00.tar.bz2"
+    url      = "https://irsa.ipac.caltech.edu/data/Planck/release_2/software/COM_Likelihood_Code-v2.0.R2.00.tar.bz2"
 
     version('2.00', sha256='c1efa208175b2751e75b2ad1c026dae744a7dd279eb74baa5db3098bc9c971bb',
-            url="http://irsa.ipac.caltech.edu/data/Planck/release_2/software/COM_Likelihood_Code-v2.0.R2.00.tar.bz2")
+            url="https://irsa.ipac.caltech.edu/data/Planck/release_2/software/COM_Likelihood_Code-v2.0.R2.00.tar.bz2")
 
     variant('lensing-ext', default=False,
             description="Provide lensing-ext data")
@@ -31,30 +31,30 @@ class PlanckLikelihood(Package):
 
     resource(
         name='baseline',
-        url="http://irsa.ipac.caltech.edu/data/Planck/release_2/software/COM_Likelihood_Data-baseline_R2.00.tar.gz",
+        url="https://irsa.ipac.caltech.edu/data/Planck/release_2/software/COM_Likelihood_Data-baseline_R2.00.tar.gz",
         sha256='7c62c5afc105bff28c2da3eddb870b8180536d30e31c4d419b307ad3996e17ab',
         destination='.')
     resource(
         name='lensing-ext',
-        url="http://irsa.ipac.caltech.edu/data/Planck/release_2/software/COM_Likelihood_Data-extra-lensing-ext.R2.00.tar.gz",
+        url="https://irsa.ipac.caltech.edu/data/Planck/release_2/software/COM_Likelihood_Data-extra-lensing-ext.R2.00.tar.gz",
         sha256='0c017984bfd12315b94958f48f8e61e625361a84066838976f676fb5c2e76dbc',
         destination='.',
         when='+lensing-ext')
     resource(
         name='plik-DS',
-        url="http://irsa.ipac.caltech.edu/data/Planck/release_2/software/COM_Likelihood_Data-extra-plik-DS.R2.00.tar.gz",
+        url="https://irsa.ipac.caltech.edu/data/Planck/release_2/software/COM_Likelihood_Data-extra-plik-DS.R2.00.tar.gz",
         sha256='f6b5ec6b284ea71008f071503faf8319dac48c3ea7fb13f5e5cbd23fff3efd84',
         destination='.',
         when='+plik-DS')
     resource(
         name='plik-HM-ext',
-        url="http://irsa.ipac.caltech.edu/data/Planck/release_2/software/COM_Likelihood_Data-extra-plik-HM-ext.R2.00.tar.gz",
+        url="https://irsa.ipac.caltech.edu/data/Planck/release_2/software/COM_Likelihood_Data-extra-plik-HM-ext.R2.00.tar.gz",
         sha256='b5b8ead297b31f9b2e4913b54b1d3bbe272075f85ce2ca9bf5d99dbbe1559f77',
         destination='.',
         when='+plik-HM-ext')
     resource(
         name='plik-unbinned',
-        url="http://irsa.ipac.caltech.edu/data/Planck/release_2/software/COM_Likelihood_Data-extra-plik-unbinned.R2.00.tar.gz",
+        url="https://irsa.ipac.caltech.edu/data/Planck/release_2/software/COM_Likelihood_Data-extra-plik-unbinned.R2.00.tar.gz",
         sha256='69cdfee40d63a8b60b1f715d4e276d76693ec1a6f1b2658abac2b8d7dff4fa44',
         destination='.',
         when='+plik-unbinned')
diff --git a/var/spack/repos/builtin/packages/platypus/package.py b/var/spack/repos/builtin/packages/platypus/package.py
index 18e65260f6..ce3070b8ad 100644
--- a/var/spack/repos/builtin/packages/platypus/package.py
+++ b/var/spack/repos/builtin/packages/platypus/package.py
@@ -10,7 +10,7 @@ class Platypus(Package):
     """A Haplotype-Based Variant Caller For Next Generation Sequence Data"""
 
     homepage = "http://www.well.ox.ac.uk/platypus"
-    url      = "http://www.well.ox.ac.uk/bioinformatics/Software/Platypus-latest.tgz"
+    url      = "https://www.well.ox.ac.uk/bioinformatics/Software/Platypus-latest.tgz"
 
     version('0.8.1', sha256='a0f39e800ebdc5590e9b568a791bc6746df0fde4d1c3622140db64dea175622b')
 
diff --git a/var/spack/repos/builtin/packages/plink/package.py b/var/spack/repos/builtin/packages/plink/package.py
index bf209fe0d2..01fe3ad9a1 100644
--- a/var/spack/repos/builtin/packages/plink/package.py
+++ b/var/spack/repos/builtin/packages/plink/package.py
@@ -14,11 +14,11 @@ class Plink(Package):
     homepage = "https://www.cog-genomics.org/plink/1.9/"
 
     version('1.9-beta6.10', sha256='f8438656996c55a5edd95c223cce96277de6efaab1b9b1d457bfee0c272058d8',
-            url='http://s3.amazonaws.com/plink1-assets/plink_linux_x86_64_20190617.zip')
+            url='https://s3.amazonaws.com/plink1-assets/plink_linux_x86_64_20190617.zip')
     version('1.9-beta5', sha256='e00ef16ac5abeb6b4c4d77846bd655fafc62669fbebf8cd2e941f07b3111907e',
             url='https://github.com/chrchang/plink-ng/archive/b15c19f.tar.gz')
     version('1.07', sha256='70c52ee47eed854293832639dbabb41c7c036db3a4881c136e6a71ecff4ac7f4',
-            url='http://zzz.bwh.harvard.edu/plink/dist/plink-1.07-x86_64.zip',
+            url='https://zzz.bwh.harvard.edu/plink/dist/plink-1.07-x86_64.zip',
             preferred=True)
 
     depends_on('atlas', when='@1.9-beta5')
diff --git a/var/spack/repos/builtin/packages/pngquant/package.py b/var/spack/repos/builtin/packages/pngquant/package.py
index 7ceaaf4a88..1901654d20 100644
--- a/var/spack/repos/builtin/packages/pngquant/package.py
+++ b/var/spack/repos/builtin/packages/pngquant/package.py
@@ -13,7 +13,7 @@ class Pngquant(AutotoolsPackage):
     """
 
     homepage = "https://pngquant.org/"
-    url      = "http://pngquant.org/pngquant-2.12.5-src.tar.gz"
+    url      = "https://pngquant.org/pngquant-2.12.5-src.tar.gz"
 
     version('2.12.5', sha256='3638936cf6270eeeaabcee42e10768d78e4dc07cac9310307835c1f58b140808')
 
diff --git a/var/spack/repos/builtin/packages/porta/package.py b/var/spack/repos/builtin/packages/porta/package.py
index 830806d4ae..950f78f363 100644
--- a/var/spack/repos/builtin/packages/porta/package.py
+++ b/var/spack/repos/builtin/packages/porta/package.py
@@ -11,7 +11,7 @@ class Porta(Package):
     """PORTA is a collection of routines for analyzing polytopes and
     polyhedra"""
     homepage = "https://porta.zib.de"
-    url      = "http://porta.zib.de/porta-1.4.1.zip"
+    url      = "https://porta.zib.de/porta-1.4.1.zip"
 
     version('1.4.1', sha256='21e3784f46f4f2154100a0c39cbd9211a26e513ffe0c9f70ab75a3bb2810b059')
 
diff --git a/var/spack/repos/builtin/packages/postgresql/package.py b/var/spack/repos/builtin/packages/postgresql/package.py
index 2f6f919706..8f45c5c9d0 100644
--- a/var/spack/repos/builtin/packages/postgresql/package.py
+++ b/var/spack/repos/builtin/packages/postgresql/package.py
@@ -15,7 +15,7 @@ class Postgresql(AutotoolsPackage):
     correctness."""
 
     homepage = "https://www.postgresql.org/"
-    url      = "http://ftp.postgresql.org/pub/source/v9.3.4/postgresql-9.3.4.tar.bz2"
+    url      = "https://ftp.postgresql.org/pub/source/v9.3.4/postgresql-9.3.4.tar.bz2"
     list_url = "http://ftp.postgresql.org/pub/source"
     list_depth = 1
 
diff --git a/var/spack/repos/builtin/packages/powertop/package.py b/var/spack/repos/builtin/packages/powertop/package.py
index 3e3848742d..59ff4a3c84 100644
--- a/var/spack/repos/builtin/packages/powertop/package.py
+++ b/var/spack/repos/builtin/packages/powertop/package.py
@@ -11,7 +11,7 @@ class Powertop(AutotoolsPackage):
     and power management"""
 
     homepage = "https://01.org/powertop/"
-    url      = "http://01.org/sites/default/files/downloads/powertop/powertop-v2.9.tar.gz"
+    url      = "https://01.org/sites/default/files/downloads/powertop/powertop-v2.9.tar.gz"
 
     version('2.9', sha256='aa7fb7d8e9a00f05e7d8a7a2866d85929741e0d03a5bf40cab22d2021c959250')
 
diff --git a/var/spack/repos/builtin/packages/price/package.py b/var/spack/repos/builtin/packages/price/package.py
index 1ce5789466..dbbade60d2 100644
--- a/var/spack/repos/builtin/packages/price/package.py
+++ b/var/spack/repos/builtin/packages/price/package.py
@@ -11,7 +11,7 @@ class Price(MakefilePackage):
        assembler implemented in C++."""
 
     homepage = "http://derisilab.ucsf.edu/software/price/"
-    url      = "http://derisilab.ucsf.edu/software/price/PriceSource140408.tar.gz"
+    url      = "https://derisilab.ucsf.edu/software/price/PriceSource140408.tar.gz"
 
     version('140408', sha256='12276b2b15f4e020a772944a19fd2aaf089d3437cbc71e7486fa8db95014843f')
 
diff --git a/var/spack/repos/builtin/packages/prng/package.py b/var/spack/repos/builtin/packages/prng/package.py
index b70ae3888a..3f97ed70d8 100644
--- a/var/spack/repos/builtin/packages/prng/package.py
+++ b/var/spack/repos/builtin/packages/prng/package.py
@@ -10,7 +10,7 @@ class Prng(AutotoolsPackage):
     """Pseudo-Random Number Generator library."""
 
     homepage = "https://statmath.wu.ac.at/prng/"
-    url      = "http://statmath.wu.ac.at/prng/prng-3.0.2.tar.gz"
+    url      = "https://statmath.wu.ac.at/prng/prng-3.0.2.tar.gz"
 
     version('3.0.2', sha256='8299182b97c24b7891d74590a8a8438641a6c681ce34d6c3f7bc98a0649da48b')
 
diff --git a/var/spack/repos/builtin/packages/pv/package.py b/var/spack/repos/builtin/packages/pv/package.py
index f3cdb7a5a3..e8de7658d8 100644
--- a/var/spack/repos/builtin/packages/pv/package.py
+++ b/var/spack/repos/builtin/packages/pv/package.py
@@ -12,6 +12,6 @@ class Pv(AutotoolsPackage):
     """
 
     homepage = "https://www.ivarch.com/programs/pv.shtml"
-    url      = "http://www.ivarch.com/programs/sources/pv-1.6.6.tar.bz2"
+    url      = "https://www.ivarch.com/programs/sources/pv-1.6.6.tar.bz2"
 
     version('1.6.6', sha256='608ef935f7a377e1439c181c4fc188d247da10d51a19ef79bcdee5043b0973f1')
diff --git a/var/spack/repos/builtin/packages/pvm/package.py b/var/spack/repos/builtin/packages/pvm/package.py
index d9f3cec108..44ec1d8818 100644
--- a/var/spack/repos/builtin/packages/pvm/package.py
+++ b/var/spack/repos/builtin/packages/pvm/package.py
@@ -14,7 +14,7 @@ class Pvm(MakefilePackage):
     by a network to be used as a single large parallel computer."""
 
     homepage = "https://www.csm.ornl.gov/pvm/pvm_home.html"
-    url      = "http://www.netlib.org/pvm3/pvm3.4.6.tgz"
+    url      = "https://www.netlib.org/pvm3/pvm3.4.6.tgz"
 
     version('3.4.6', sha256='482665e9bc975d826bcdacf1df1d42e43deda9585a2c430fd3b7b7ed08eada44')
 
diff --git a/var/spack/repos/builtin/packages/pxz/package.py b/var/spack/repos/builtin/packages/pxz/package.py
index 8c0dea6e56..213099bef2 100644
--- a/var/spack/repos/builtin/packages/pxz/package.py
+++ b/var/spack/repos/builtin/packages/pxz/package.py
@@ -10,7 +10,7 @@ class Pxz(MakefilePackage):
     """Pxz is a parallel LZMA compressor using liblzma."""
 
     homepage = "https://jnovy.fedorapeople.org/pxz/pxz.html"
-    url      = "http://jnovy.fedorapeople.org/pxz/pxz-4.999.9beta.20091201git.tar.xz"
+    url      = "https://jnovy.fedorapeople.org/pxz/pxz-4.999.9beta.20091201git.tar.xz"
     git      = "https://github.com/jnovy/pxz.git"
 
     version('develop', branch='master')
diff --git a/var/spack/repos/builtin/packages/py-biopython/package.py b/var/spack/repos/builtin/packages/py-biopython/package.py
index 1b67ff30f7..e40eee68f0 100644
--- a/var/spack/repos/builtin/packages/py-biopython/package.py
+++ b/var/spack/repos/builtin/packages/py-biopython/package.py
@@ -13,7 +13,7 @@ class PyBiopython(PythonPackage):
 
     """
     homepage = "https://biopython.org/wiki/Main_Page"
-    url      = "http://biopython.org/DIST/biopython-1.65.tar.gz"
+    url      = "https://biopython.org/DIST/biopython-1.65.tar.gz"
 
     version('1.78', sha256='1ee0a0b6c2376680fea6642d5080baa419fd73df104a62d58a8baf7a8bbe4564')
     version('1.73', sha256='70c5cc27dc61c23d18bb33b6d38d70edc4b926033aea3b7434737c731c94a5e0')
diff --git a/var/spack/repos/builtin/packages/py-bsddb3/package.py b/var/spack/repos/builtin/packages/py-bsddb3/package.py
index 038f2c7eab..2c329e3bd6 100644
--- a/var/spack/repos/builtin/packages/py-bsddb3/package.py
+++ b/var/spack/repos/builtin/packages/py-bsddb3/package.py
@@ -21,4 +21,4 @@ class PyBsddb3(PythonPackage):
     depends_on('berkeley-db')
 
     # For testing... see here for an example that uses BerkeleyDB
-    # http://code.activestate.com/recipes/189060-using-berkeley-db-database/
+    # https://code.activestate.com/recipes/189060-using-berkeley-db-database/
diff --git a/var/spack/repos/builtin/packages/py-haphpipe/package.py b/var/spack/repos/builtin/packages/py-haphpipe/package.py
index 191ad706a8..7686cc292b 100644
--- a/var/spack/repos/builtin/packages/py-haphpipe/package.py
+++ b/var/spack/repos/builtin/packages/py-haphpipe/package.py
@@ -19,7 +19,7 @@ class PyHaphpipe(PythonPackage):
 
     # Deps. taken from
     # https://github.com/bioconda/bioconda-recipes/blob/master/recipes/haphpipe/meta.yaml
-    # http://bioconda.github.io/recipes/haphpipe/README.html
+    # https://bioconda.github.io/recipes/haphpipe/README.html
     # https://github.com/gwcbi/haphpipe/blob/master/environment.yml
     depends_on('python@3.7:', type=('build', 'run'))
     depends_on('py-future', type=('build', 'run'))
diff --git a/var/spack/repos/builtin/packages/py-kerberos/package.py b/var/spack/repos/builtin/packages/py-kerberos/package.py
index 5191188f48..84afbb8d7c 100644
--- a/var/spack/repos/builtin/packages/py-kerberos/package.py
+++ b/var/spack/repos/builtin/packages/py-kerberos/package.py
@@ -10,7 +10,7 @@ class PyKerberos(PythonPackage):
     that wraps the entire Kerberos.framework, and instead offer a
     limited set of functions that do what is needed for client/server
     Kerberos authentication based on
-    <http://www.ietf.org/rfc/rfc4559.txt>."""
+    <https://www.ietf.org/rfc/rfc4559.txt>."""
 
     homepage = "https://github.com/apple/ccs-pykerberos"
     pypi = "kerberos/kerberos-1.3.0.tar.gz"
diff --git a/var/spack/repos/builtin/packages/py-petsc4py/package.py b/var/spack/repos/builtin/packages/py-petsc4py/package.py
index 94bb8c98dd..e415dba5d3 100644
--- a/var/spack/repos/builtin/packages/py-petsc4py/package.py
+++ b/var/spack/repos/builtin/packages/py-petsc4py/package.py
@@ -11,7 +11,7 @@ class PyPetsc4py(PythonPackage):
     """
 
     homepage = "https://gitlab.com/petsc/petsc4py"
-    url      = "http://ftp.mcs.anl.gov/pub/petsc/release-snapshots/petsc4py-3.15.0.tar.gz"
+    url      = "https://ftp.mcs.anl.gov/pub/petsc/release-snapshots/petsc4py-3.15.0.tar.gz"
     git      = "https://gitlab.com/petsc/petsc.git"
 
     maintainers = ['balay']
diff --git a/var/spack/repos/builtin/packages/py-ply/package.py b/var/spack/repos/builtin/packages/py-ply/package.py
index b187f50833..2c1b064d76 100644
--- a/var/spack/repos/builtin/packages/py-ply/package.py
+++ b/var/spack/repos/builtin/packages/py-ply/package.py
@@ -9,7 +9,7 @@ from spack import *
 class PyPly(PythonPackage):
     """PLY is nothing more than a straightforward lex/yacc implementation."""
     homepage = "http://www.dabeaz.com/ply"
-    url      = "http://www.dabeaz.com/ply/ply-3.11.tar.gz"
+    url      = "https://www.dabeaz.com/ply/ply-3.11.tar.gz"
 
     version('3.11', sha256='00c7c1aaa88358b9c765b6d3000c6eec0ba42abca5351b095321aef446081da3')
     version('3.8', sha256='e7d1bdff026beb159c9942f7a17e102c375638d9478a7ecd4cc0c76afd8de0b8')
diff --git a/var/spack/repos/builtin/packages/py-pyepsg/package.py b/var/spack/repos/builtin/packages/py-pyepsg/package.py
index 4a41536d43..25f180d37c 100644
--- a/var/spack/repos/builtin/packages/py-pyepsg/package.py
+++ b/var/spack/repos/builtin/packages/py-pyepsg/package.py
@@ -7,7 +7,7 @@ from spack import *
 
 
 class PyPyepsg(PythonPackage):
-    """Provides simple access to http://epsg.io/."""
+    """Provides simple access to https://epsg.io/."""
 
     homepage = "https://pyepsg.readthedocs.io/en/latest/"
     pypi = "pyepsg/pyepsg-0.3.2.tar.gz"
diff --git a/var/spack/repos/builtin/packages/py-pygit2/package.py b/var/spack/repos/builtin/packages/py-pygit2/package.py
index 9e6deb9107..1459dc2a23 100644
--- a/var/spack/repos/builtin/packages/py-pygit2/package.py
+++ b/var/spack/repos/builtin/packages/py-pygit2/package.py
@@ -22,7 +22,7 @@ class PyPygit2(PythonPackage):
 
     depends_on('py-setuptools', type='build')
     # Version must match with libgit2
-    # See: http://www.pygit2.org/install.html
+    # See: https://www.pygit2.org/install.html
     depends_on('libgit2@1.1:1.1.99', when='@1.4:')
     depends_on('libgit2@1.0:1.0.99', when='@1.2:1.3.99')
     depends_on('libgit2@0.99:1.0.99', when='@1.1:1.1.99')
@@ -39,6 +39,6 @@ class PyPygit2(PythonPackage):
 
     def setup_build_environment(self, env):
         spec = self.spec
-        # http://www.pygit2.org/install.html
+        # https://www.pygit2.org/install.html
         env.set('LIBGIT2', spec['libgit2'].prefix)
         env.set('LIBGIT2_LIB', spec['libgit2'].prefix.lib)
diff --git a/var/spack/repos/builtin/packages/py-pynvml/package.py b/var/spack/repos/builtin/packages/py-pynvml/package.py
index 035b48a3a9..9eea797d0d 100644
--- a/var/spack/repos/builtin/packages/py-pynvml/package.py
+++ b/var/spack/repos/builtin/packages/py-pynvml/package.py
@@ -8,7 +8,7 @@ class PyPynvml(PythonPackage):
     """Provides a Python interface to GPU management and monitoring
     functions. This is a wrapper around the NVML library. For
     information about the NVML library, see the NVML developer page
-    http://developer.nvidia.com/nvidia-management-library-nvml"""
+    https://developer.nvidia.com/nvidia-management-library-nvml"""
 
     homepage = "https://www.nvidia.com/"
     pypi = "pynvml/pynvml-8.0.4.tar.gz"
diff --git a/var/spack/repos/builtin/packages/py-pyside/package.py b/var/spack/repos/builtin/packages/py-pyside/package.py
index 20de47e4d3..4e267c781d 100644
--- a/var/spack/repos/builtin/packages/py-pyside/package.py
+++ b/var/spack/repos/builtin/packages/py-pyside/package.py
@@ -14,7 +14,7 @@ class PyPyside(PythonPackage):
 
     # More recent versions of PySide2 (for Qt5) have been taken under
     # the offical Qt umbrella.  For more information, see:
-    # http://wiki.qt.io/Qt_for_Python_Development_Getting_Started
+    # https://wiki.qt.io/Qt_for_Python_Development_Getting_Started
 
     # Version 1.2.4 claims to not work with Python 3.5, mostly
     # because it hasn't been tested.  Otherwise, it's the same as v1.2.3
diff --git a/var/spack/repos/builtin/packages/py-pyside2/package.py b/var/spack/repos/builtin/packages/py-pyside2/package.py
index f6d17bf8aa..b98244a4f5 100644
--- a/var/spack/repos/builtin/packages/py-pyside2/package.py
+++ b/var/spack/repos/builtin/packages/py-pyside2/package.py
@@ -14,7 +14,7 @@ class PyPyside2(PythonPackage):
 
     # More recent versions of PySide2 (for Qt5) have been taken under
     # the offical Qt umbrella.  For more information, see:
-    # http://wiki.qt.io/Qt_for_Python_Development_Getting_Started
+    # https://wiki.qt.io/Qt_for_Python_Development_Getting_Started
 
     version('develop', tag='dev')
     version('5.14.2.1', tag='v5.14.2.1', submodules=True)
diff --git a/var/spack/repos/builtin/packages/py-python-igraph/package.py b/var/spack/repos/builtin/packages/py-python-igraph/package.py
index 6c16df7afa..78110b9f15 100644
--- a/var/spack/repos/builtin/packages/py-python-igraph/package.py
+++ b/var/spack/repos/builtin/packages/py-python-igraph/package.py
@@ -11,7 +11,7 @@ class PyPythonIgraph(PythonPackage):
        efficiency, portability and ease of use."""
 
     homepage = "https://igraph.org/"
-    url      = "http://igraph.org/nightly/get/python/python-igraph-0.7.0.tar.gz"
+    url      = "https://igraph.org/nightly/get/python/python-igraph-0.7.0.tar.gz"
 
     version('0.7.0', sha256='64ac270e80a92066d489407be1900a329df8e26844430f941ecc88771188c471')
 
diff --git a/var/spack/repos/builtin/packages/py-sfepy/package.py b/var/spack/repos/builtin/packages/py-sfepy/package.py
index ac2fab19f7..7d126b764a 100644
--- a/var/spack/repos/builtin/packages/py-sfepy/package.py
+++ b/var/spack/repos/builtin/packages/py-sfepy/package.py
@@ -7,7 +7,7 @@ from spack import *
 
 
 class PySfepy(PythonPackage):
-    """SfePy (http://sfepy.org) is a software for solving systems of coupled
+    """SfePy (https://sfepy.org/) is a software for solving systems of coupled
     partial differential equations (PDEs) by the finite element method in 1D,
     2D and 3D. It can be viewed both as black-box PDE solver, and as a Python
     package which can be used for building custom applications.
diff --git a/var/spack/repos/builtin/packages/py-statsmodels/package.py b/var/spack/repos/builtin/packages/py-statsmodels/package.py
index 0a669a5969..c5fd16cf90 100644
--- a/var/spack/repos/builtin/packages/py-statsmodels/package.py
+++ b/var/spack/repos/builtin/packages/py-statsmodels/package.py
@@ -26,7 +26,7 @@ class PyStatsmodels(PythonPackage):
     depends_on('python@2.7:2.8,3.4:', when='@0.10.1:', type=('build', 'link', 'run'))
     depends_on('python@3.6:',         when='@0.12.1:', type=('build', 'link', 'run'))
 
-    # according to http://www.statsmodels.org/dev/install.html earlier versions
+    # according to https://www.statsmodels.org/dev/install.html earlier versions
     # might work.
     depends_on('py-setuptools@0.6c5:', type='build')
     depends_on('py-cython@0.29:', type='build')
diff --git a/var/spack/repos/builtin/packages/qt-creator/package.py b/var/spack/repos/builtin/packages/qt-creator/package.py
index 5d22e208f7..69c1462e91 100644
--- a/var/spack/repos/builtin/packages/qt-creator/package.py
+++ b/var/spack/repos/builtin/packages/qt-creator/package.py
@@ -9,9 +9,9 @@ from spack import *
 class QtCreator(QMakePackage):
     """The Qt Creator IDE."""
     homepage = 'https://www.qt.io/ide/'
-    url      = 'http://download.qt.io/official_releases/qtcreator/4.8/4.8.0/qt-creator-opensource-src-4.8.0.tar.gz'
+    url      = 'https://download.qt.io/official_releases/qtcreator/4.8/4.8.0/qt-creator-opensource-src-4.8.0.tar.gz'
 
-    list_url = 'http://download.qt.io/official_releases/qtcreator/'
+    list_url = 'https://download.qt.io/official_releases/qtcreator/'
     list_depth = 2
 
     version('4.8.0', sha256='4c4813454637141a45aa8f18be5733e4ba993335d95940aadf12fda66cf6f849')
@@ -29,7 +29,7 @@ class QtCreator(QMakePackage):
     conflicts('%gcc@:4.8', when='@4.3.0:')
 
     def url_for_version(self, version):
-        url = 'http://download.qt.io/official_releases/qtcreator/{0}/{1}/qt-creator-opensource-src-{1}.tar.gz'
+        url = 'https://download.qt.io/official_releases/qtcreator/{0}/{1}/qt-creator-opensource-src-{1}.tar.gz'
         return url.format(version.up_to(2), version)
 
     def setup_build_environment(self, env):
diff --git a/var/spack/repos/builtin/packages/qt/package.py b/var/spack/repos/builtin/packages/qt/package.py
index e3ddac3824..eeb48391ea 100644
--- a/var/spack/repos/builtin/packages/qt/package.py
+++ b/var/spack/repos/builtin/packages/qt/package.py
@@ -21,7 +21,7 @@ class Qt(Package):
     # Supported releases: 'https://download.qt.io/official_releases/qt/'
     # Older archives: 'https://download.qt.io/new_archive/qt/'
     url      = 'https://download.qt.io/archive/qt/5.15/5.15.2/single/qt-everywhere-src-5.15.2.tar.xz'
-    list_url = 'http://download.qt.io/archive/qt/'
+    list_url = 'https://download.qt.io/archive/qt/'
     list_depth = 3
     maintainers = ['sethrj']
 
@@ -459,7 +459,7 @@ class Qt(Package):
         spec = self.spec
         version = self.version
 
-        # incomplete list is here http://doc.qt.io/qt-5/configure-options.html
+        # incomplete list is here https://doc.qt.io/qt-5/configure-options.html
         config_args = [
             '-prefix', self.prefix,
             '-v',
diff --git a/var/spack/repos/builtin/packages/r-biom-utils/package.py b/var/spack/repos/builtin/packages/r-biom-utils/package.py
index 67e7c2fb7a..5cf396e03f 100644
--- a/var/spack/repos/builtin/packages/r-biom-utils/package.py
+++ b/var/spack/repos/builtin/packages/r-biom-utils/package.py
@@ -8,7 +8,7 @@ from spack import *
 
 class RBiomUtils(RPackage):
     """Provides utilities to facilitate import, export and computation with
-    the BIOM (Biological Observation Matrix) format (http://biom-format.org).
+    the BIOM (Biological Observation Matrix) format (https://biom-format.org/).
     """
 
     homepage = "https://github.com/braithwaite/BIOM.utils/"
diff --git a/var/spack/repos/builtin/packages/r-cdcfluview/package.py b/var/spack/repos/builtin/packages/r-cdcfluview/package.py
index 65213e4e25..b0f164bf9d 100644
--- a/var/spack/repos/builtin/packages/r-cdcfluview/package.py
+++ b/var/spack/repos/builtin/packages/r-cdcfluview/package.py
@@ -11,7 +11,7 @@ class RCdcfluview(RPackage):
     Control and Prevention ('CDC') 'FluView' Portal
 
     The 'U.S.' Centers for Disease Control ('CDC') maintains a portal
-    <http://gis.cdc.gov/grasp/fluview/fluportaldashboard.html> for accessing
+    <https://gis.cdc.gov/grasp/fluview/fluportaldashboard.html> for accessing
     state, regional and national influenza statistics as well as Mortality
     Surveillance Data. The web interface makes it difficult and time-consuming
     to select and retrieve influenza data. Tools are provided to access the
diff --git a/var/spack/repos/builtin/packages/r-colorspace/package.py b/var/spack/repos/builtin/packages/r-colorspace/package.py
index 725591c3b2..fe71033bda 100644
--- a/var/spack/repos/builtin/packages/r-colorspace/package.py
+++ b/var/spack/repos/builtin/packages/r-colorspace/package.py
@@ -21,7 +21,7 @@ class RColorspace(RPackage):
     include: desaturation, lightening/darkening, mixing, and simulation of
     color vision deficiencies (deutanomaly, protanomaly, tritanomaly). Details
     can be found on the project web page at
-    <http://colorspace.R-Forge.R-project.org/> and in the accompanying
+    <https://colorspace.R-Forge.R-project.org/> and in the accompanying
     scientific paper: Zeileis et al. (2020, Journal of Statistical Software,
     <doi:10.18637/jss.v096.i01>)."""
 
diff --git a/var/spack/repos/builtin/packages/r-covr/package.py b/var/spack/repos/builtin/packages/r-covr/package.py
index f6b0c7332f..6a7cfe0391 100644
--- a/var/spack/repos/builtin/packages/r-covr/package.py
+++ b/var/spack/repos/builtin/packages/r-covr/package.py
@@ -11,7 +11,7 @@ class RCovr(RPackage):
 
     Track and report code coverage for your package and (optionally)
     upload the results to a coverage service like 'Codecov'
-    <http://codecov.io> or 'Coveralls' <http://coveralls.io>. Code
+    <http://codecov.io> or 'Coveralls' <https://coveralls.io/>. Code
     coverage is a measure of the amount of code being exercised by a
     set of tests. It is an indirect measure of test quality and
     completeness. This package is compatible with any testing methodology
diff --git a/var/spack/repos/builtin/packages/r-fdb-infiniummethylation-hg18/package.py b/var/spack/repos/builtin/packages/r-fdb-infiniummethylation-hg18/package.py
index f84223b4a2..f2e81cfe40 100644
--- a/var/spack/repos/builtin/packages/r-fdb-infiniummethylation-hg18/package.py
+++ b/var/spack/repos/builtin/packages/r-fdb-infiniummethylation-hg18/package.py
@@ -13,7 +13,7 @@ class RFdbInfiniummethylationHg18(RPackage):
 
     # This is a bioconductor package but there is no available git repository
     homepage = "https://bioconductor.org/packages/release/data/annotation/html/FDb.InfiniumMethylation.hg18.html"
-    url      = "http://bioconductor.org/packages/release/data/annotation/src/contrib/FDb.InfiniumMethylation.hg18_2.2.0.tar.gz"
+    url      = "https://bioconductor.org/packages/release/data/annotation/src/contrib/FDb.InfiniumMethylation.hg18_2.2.0.tar.gz"
 
     version('2.2.0', sha256='4a9028ac03c11fffbab731ea750bc7f9b0884fc43c6a8dac6eb2c644e4c79f6f')
 
diff --git a/var/spack/repos/builtin/packages/r-fit-models/package.py b/var/spack/repos/builtin/packages/r-fit-models/package.py
index ae80f1946e..973b479e12 100644
--- a/var/spack/repos/builtin/packages/r-fit-models/package.py
+++ b/var/spack/repos/builtin/packages/r-fit-models/package.py
@@ -13,7 +13,7 @@ class RFitModels(RPackage):
     summary, plot, etc.) were originally provided in the robust package to
     compare robustly and classically fitted model objects. See chapters 2, 3,
     and 5 in Insightful (2002) 'Robust Library User's Guide'
-    <http://robust.r-forge.r-project.org/Robust.pdf>). The aim of the
+    <https://robust.r-forge.r-project.org/Robust.pdf>). The aim of the
     fit.models package is to separate this fitted model object comparison
     functionality from the robust package and to extend it to support fitting
     methods (e.g., classical, robust, Bayesian, regularized, etc.) more
diff --git a/var/spack/repos/builtin/packages/r-fpcompare/package.py b/var/spack/repos/builtin/packages/r-fpcompare/package.py
index 95f96fcacc..4a42706321 100644
--- a/var/spack/repos/builtin/packages/r-fpcompare/package.py
+++ b/var/spack/repos/builtin/packages/r-fpcompare/package.py
@@ -14,7 +14,7 @@ class RFpcompare(RPackage):
     being aware of these problems, people still use numerical methods
     that fail to account for these and other rounding errors (this pitfall
     is the first to be highlighted in Circle 1 of Burns (2012) 'The R
-    Inferno' <http://www.burns-stat.com/pages/Tutor/R_inferno.pdf>). This
+    Inferno' <https://www.burns-stat.com/pages/Tutor/R_inferno.pdf>). This
     package provides new relational operators useful for performing
     floating point number comparisons with a set tolerance."""
 
diff --git a/var/spack/repos/builtin/packages/r-imager/package.py b/var/spack/repos/builtin/packages/r-imager/package.py
index 7fb01450a0..08b97a7dc7 100644
--- a/var/spack/repos/builtin/packages/r-imager/package.py
+++ b/var/spack/repos/builtin/packages/r-imager/package.py
@@ -13,7 +13,7 @@ class RImager(RPackage):
     dimensions, one time/depth dimension, one colour dimension). Provides most
     traditional image processing tools (filtering, morphology, transformations,
     etc.) as well as various functions for easily analysing image data using R.
-    The package wraps 'CImg', <http://cimg.eu>, a simple, modern C++ library
+    The package wraps 'CImg', <https://cimg.eu/>, a simple, modern C++ library
     for image processing."""
 
     homepage = "https://dahtah.github.io/imager"
diff --git a/var/spack/repos/builtin/packages/r-libcoin/package.py b/var/spack/repos/builtin/packages/r-libcoin/package.py
index ee39d155db..8022013f5c 100644
--- a/var/spack/repos/builtin/packages/r-libcoin/package.py
+++ b/var/spack/repos/builtin/packages/r-libcoin/package.py
@@ -11,7 +11,7 @@ class RLibcoin(RPackage):
 
     Basic infrastructure for linear test statistics and permutation
     inference in the framework of Strasser and Weber (1999)
-    <http://epub.wu.ac.at/102/>. This package must not be used by end-users.
+    <https://epub.wu.ac.at/102/>. This package must not be used by end-users.
     CRAN package 'coin' implements all user interfaces and is ready to be used
     by anyone."""
 
diff --git a/var/spack/repos/builtin/packages/r-lwgeom/package.py b/var/spack/repos/builtin/packages/r-lwgeom/package.py
index 140bd6113e..bca2bf2298 100644
--- a/var/spack/repos/builtin/packages/r-lwgeom/package.py
+++ b/var/spack/repos/builtin/packages/r-lwgeom/package.py
@@ -11,7 +11,7 @@ class RLwgeom(RPackage):
 
     Access to selected functions found in 'liblwgeom'
     <https://github.com/postgis/postgis/tree/master/liblwgeom>, the
-    light-weight geometry library used by 'PostGIS' <http://postgis.net/>."""
+    light-weight geometry library used by 'PostGIS' <https://postgis.net/>."""
 
     homepage = "https://github.com/r-spatial/lwgeom/"
     cran     = "lwgeom"
diff --git a/var/spack/repos/builtin/packages/r-markdown/package.py b/var/spack/repos/builtin/packages/r-markdown/package.py
index d50178b1e5..6168bb7e35 100644
--- a/var/spack/repos/builtin/packages/r-markdown/package.py
+++ b/var/spack/repos/builtin/packages/r-markdown/package.py
@@ -10,7 +10,7 @@ class RMarkdown(RPackage):
     """Provides R bindings to the 'Sundown' 'Markdown' rendering library
     (https://github.com/vmg/sundown). 'Markdown' is a plain-text formatting
     syntax that can be converted to 'XHTML' or other formats. See
-    http://en.wikipedia.org/wiki/Markdown for more information about
+    https://en.wikipedia.org/wiki/Markdown for more information about
     'Markdown'."""
 
     homepage = "https://cloud.r-project.org/package=markdown"
diff --git a/var/spack/repos/builtin/packages/r-multicool/package.py b/var/spack/repos/builtin/packages/r-multicool/package.py
index 662f1f12bb..eb8f9a8190 100644
--- a/var/spack/repos/builtin/packages/r-multicool/package.py
+++ b/var/spack/repos/builtin/packages/r-multicool/package.py
@@ -22,7 +22,7 @@ class RMulticool(RPackage):
     conditions. The package also generates the integer partitions of a
     positive, non-zero integer n. The C++ code for this is based on Python code
     from Jerome Kelleher which can be found here
-    <http://jeromekelleher.net/tag/integer-partitions.html>. The C++ code and
+    <https://jeromekelleher.net/tag/integer-partitions.html>. The C++ code and
     Python code are distributed without conditions."""
 
     homepage = "https://cloud.r-project.org/package=multicool"
diff --git a/var/spack/repos/builtin/packages/r-rcolorbrewer/package.py b/var/spack/repos/builtin/packages/r-rcolorbrewer/package.py
index 8cc247a6cf..db5a5df3c9 100644
--- a/var/spack/repos/builtin/packages/r-rcolorbrewer/package.py
+++ b/var/spack/repos/builtin/packages/r-rcolorbrewer/package.py
@@ -8,7 +8,7 @@ from spack import *
 
 class RRcolorbrewer(RPackage):
     """Provides color schemes for maps (and other graphics) designed by Cynthia
-    Brewer as described at http://colorbrewer2.org"""
+    Brewer as described at https://colorbrewer2.org/"""
 
     homepage = "https://colorbrewer2.org"
     url      = "https://cloud.r-project.org/src/contrib/RColorBrewer_1.1-2.tar.gz"
diff --git a/var/spack/repos/builtin/packages/r-reprex/package.py b/var/spack/repos/builtin/packages/r-reprex/package.py
index a5cf5fccc9..91467dc258 100644
--- a/var/spack/repos/builtin/packages/r-reprex/package.py
+++ b/var/spack/repos/builtin/packages/r-reprex/package.py
@@ -11,7 +11,7 @@ class RReprex(RPackage):
        snippets of code to target formats that include both code and output.
        The goal is to encourage the sharing of small, reproducible, and
        runnable examples on code-oriented websites, such as
-       <http://stackoverflow.com> and <https://github.com>, or in email.
+       <https://stackoverflow.com/> and <https://github.com>, or in email.
        'reprex' also extracts clean, runnable R code from various common
        formats, such as copy/paste from an R session."""
 
diff --git a/var/spack/repos/builtin/packages/r-rmutil/package.py b/var/spack/repos/builtin/packages/r-rmutil/package.py
index 34c7329280..1d429d83a4 100644
--- a/var/spack/repos/builtin/packages/r-rmutil/package.py
+++ b/var/spack/repos/builtin/packages/r-rmutil/package.py
@@ -12,7 +12,7 @@ class RRmutil(RPackage):
     A toolkit of functions for nonlinear regression and repeated measurements
     not to be used by itself but called by other Lindsey packages such as
     'gnlm', 'stable', 'growth', 'repeated', and 'event'  (available at
-    <http://www.commanster.eu/rcode.html>)."""
+    <https://www.commanster.eu/rcode.html>)."""
 
     homepage = "https://www.commanster.eu/rcode.html"
     url      = "https://cloud.r-project.org/src/contrib/rmutil_1.1.3.tar.gz"
diff --git a/var/spack/repos/builtin/packages/r-subplex/package.py b/var/spack/repos/builtin/packages/r-subplex/package.py
index cb0c587a41..044d254a0e 100644
--- a/var/spack/repos/builtin/packages/r-subplex/package.py
+++ b/var/spack/repos/builtin/packages/r-subplex/package.py
@@ -10,7 +10,7 @@ class RSubplex(RPackage):
     """Unconstrained Optimization using the Subplex Algorithm
 
     The subplex algorithm for unconstrained optimization, developed by Tom
-    Rowan <http://www.netlib.org/opt/subplex.tgz>."""
+    Rowan <https://www.netlib.org/opt/subplex.tgz>."""
 
     homepage = "https://cloud.r-project.org/package=subplex"
     url      = "https://cloud.r-project.org/src/contrib/subplex_1.4-1.tar.gz"
diff --git a/var/spack/repos/builtin/packages/r-threejs/package.py b/var/spack/repos/builtin/packages/r-threejs/package.py
index b6efcb3082..d30d56076c 100644
--- a/var/spack/repos/builtin/packages/r-threejs/package.py
+++ b/var/spack/repos/builtin/packages/r-threejs/package.py
@@ -10,7 +10,7 @@ class RThreejs(RPackage):
     """Interactive 3D Scatter Plots, Networks and Globes
 
     Create interactive 3D scatter plots, network plots, and globes using the
-    'three.js' visualization library ("http://threejs.org")."""
+    'three.js' visualization library ("https://threejs.org/")."""
 
     homepage = "https://bwlewis.github.io/rthreejs"
     url      = "https://cloud.r-project.org/src/contrib/threejs_0.2.2.tar.gz"
diff --git a/var/spack/repos/builtin/packages/r-txdb-hsapiens-ucsc-hg18-knowngene/package.py b/var/spack/repos/builtin/packages/r-txdb-hsapiens-ucsc-hg18-knowngene/package.py
index f16d663f39..404c19aabe 100644
--- a/var/spack/repos/builtin/packages/r-txdb-hsapiens-ucsc-hg18-knowngene/package.py
+++ b/var/spack/repos/builtin/packages/r-txdb-hsapiens-ucsc-hg18-knowngene/package.py
@@ -14,7 +14,7 @@ class RTxdbHsapiensUcscHg18Knowngene(RPackage):
 
     # This is a bioconductor package but ther is no available git repo
     homepage = "https://bioconductor.org/packages/release/data/annotation/html/TxDb.Hsapiens.UCSC.hg18.knownGene.html"
-    url      = "http://bioconductor.org/packages/release/data/annotation/src/contrib/TxDb.Hsapiens.UCSC.hg18.knownGene_3.2.2.tar.gz"
+    url      = "https://bioconductor.org/packages/release/data/annotation/src/contrib/TxDb.Hsapiens.UCSC.hg18.knownGene_3.2.2.tar.gz"
 
     version('3.2.2', sha256='bc9ca40b4eab87f5ca64a4b876d42502b9b8e9f5983d745bfe0ee349d97b69fa')
 
diff --git a/var/spack/repos/builtin/packages/r-yaml/package.py b/var/spack/repos/builtin/packages/r-yaml/package.py
index 29e6b1c403..1f08863ff1 100644
--- a/var/spack/repos/builtin/packages/r-yaml/package.py
+++ b/var/spack/repos/builtin/packages/r-yaml/package.py
@@ -10,7 +10,7 @@ class RYaml(RPackage):
     """Methods to Convert R Data to YAML and Back
 
     Implements the 'libyaml' 'YAML' 1.1 parser and emitter
-    (<http://pyyaml.org/wiki/LibYAML>) for R."""
+    (<https://pyyaml.org/wiki/LibYAML>) for R."""
 
     homepage = "https://cloud.r-project.org/package=yaml"
     url      = "https://cloud.r-project.org/src/contrib/yaml_2.1.13.tar.gz"
diff --git a/var/spack/repos/builtin/packages/ragel/package.py b/var/spack/repos/builtin/packages/ragel/package.py
index b2e240d552..b3956c8438 100644
--- a/var/spack/repos/builtin/packages/ragel/package.py
+++ b/var/spack/repos/builtin/packages/ragel/package.py
@@ -17,7 +17,7 @@ class Ragel(AutotoolsPackage):
     """
     homepage = "https://www.colm.net/open-source/ragel"
     git      = "git://colm.net/ragel.git"
-    url      = "http://www.colm.net/files/ragel/ragel-6.10.tar.gz"
+    url      = "https://www.colm.net/files/ragel/ragel-6.10.tar.gz"
 
     version('6.10', sha256='5f156edb65d20b856d638dd9ee2dfb43285914d9aa2b6ec779dac0270cd56c3f')
 
diff --git a/var/spack/repos/builtin/packages/random123/package.py b/var/spack/repos/builtin/packages/random123/package.py
index 03315288d2..7e9a898d23 100644
--- a/var/spack/repos/builtin/packages/random123/package.py
+++ b/var/spack/repos/builtin/packages/random123/package.py
@@ -13,7 +13,7 @@ class Random123(Package):
     conventional approach of using N iterations of a stateful
     transformation."""
     homepage = "https://www.deshawresearch.com/resources_random123.html"
-    url      = "http://www.deshawresearch.com/downloads/download_random123.cgi/Random123-1.09.tar.gz"
+    url      = "https://www.deshawresearch.com/downloads/download_random123.cgi/Random123-1.09.tar.gz"
 
     version('1.13.2', sha256='74a1c6bb66b2684f03d3b1008642a2e9141909103cd09f428d2c60bcaa51cb40')
     version('1.10', sha256='4afdfba4b941e33e23b5de9b7907b7e3ac326cb4d34b5fa8225edd00b5fe053b')
diff --git a/var/spack/repos/builtin/packages/raptor2/package.py b/var/spack/repos/builtin/packages/raptor2/package.py
index deed2dc445..161b939a38 100644
--- a/var/spack/repos/builtin/packages/raptor2/package.py
+++ b/var/spack/repos/builtin/packages/raptor2/package.py
@@ -10,7 +10,7 @@ class Raptor2(AutotoolsPackage):
     """libraptor2 for parsing and serializing RDF syntaxes"""
 
     homepage = "https://librdf.org/"
-    url      = "http://download.librdf.org/source/raptor2-2.0.15.tar.gz"
+    url      = "https://download.librdf.org/source/raptor2-2.0.15.tar.gz"
 
     version('2.0.15', sha256='ada7f0ba54787b33485d090d3d2680533520cd4426d2f7fb4782dd4a6a1480ed')
 
diff --git a/var/spack/repos/builtin/packages/rasqal/package.py b/var/spack/repos/builtin/packages/rasqal/package.py
index 8ec29bd19e..ec2559614a 100644
--- a/var/spack/repos/builtin/packages/rasqal/package.py
+++ b/var/spack/repos/builtin/packages/rasqal/package.py
@@ -13,7 +13,7 @@ class Rasqal(AutotoolsPackage):
     results as bindings, boolean, RDF graphs/triples or syntaxes."""
 
     homepage = "https://librdf.org/"
-    url      = "http://download.librdf.org/source/rasqal-0.9.33.tar.gz"
+    url      = "https://download.librdf.org/source/rasqal-0.9.33.tar.gz"
 
     version('0.9.33', sha256='6924c9ac6570bd241a9669f83b467c728a322470bf34f4b2da4f69492ccfd97c')
     version('0.9.32', sha256='eeba03218e3b7dfa033934d523a1a64671a9a0f64eadc38a01e4b43367be2e8f')
diff --git a/var/spack/repos/builtin/packages/readline/package.py b/var/spack/repos/builtin/packages/readline/package.py
index c092b26b8d..ed0800c3ae 100644
--- a/var/spack/repos/builtin/packages/readline/package.py
+++ b/var/spack/repos/builtin/packages/readline/package.py
@@ -24,7 +24,7 @@ class Readline(AutotoolsPackage, GNUMirrorPackage):
     version('6.3', sha256='56ba6071b9462f980c5a72ab0023893b65ba6debb4eeb475d7a563dc65cafd43')
 
     depends_on('ncurses')
-    # from url=http://www.linuxfromscratch.org/patches/downloads/readline/readline-6.3-upstream_fixes-1.patch
+    # from url=https://www.linuxfromscratch.org/patches/downloads/readline/readline-6.3-upstream_fixes-1.patch
     # this fixes a bug that could lead to seg faults in ipython
     patch('readline-6.3-upstream_fixes-1.patch', when='@6.3')
 
diff --git a/var/spack/repos/builtin/packages/redland-bindings/package.py b/var/spack/repos/builtin/packages/redland-bindings/package.py
index fd231a0d7b..934a787149 100644
--- a/var/spack/repos/builtin/packages/redland-bindings/package.py
+++ b/var/spack/repos/builtin/packages/redland-bindings/package.py
@@ -12,7 +12,7 @@ class RedlandBindings(AutotoolsPackage):
     """Redland Language Bindings for language APIs to Redland"""
 
     homepage = "https://librdf.org/"
-    url      = "http://download.librdf.org/source/redland-bindings-1.0.17.1.tar.gz"
+    url      = "https://download.librdf.org/source/redland-bindings-1.0.17.1.tar.gz"
 
     version('1.0.17.1', sha256='ff72b587ab55f09daf81799cb3f9d263708fad5df7a5458f0c28566a2563b7f5')
     version('1.0.16.1', sha256='065037ef61e9b78f642e75b9c2a42700eb1a87d903f2f9963d86591c7d916826')
diff --git a/var/spack/repos/builtin/packages/redland/package.py b/var/spack/repos/builtin/packages/redland/package.py
index 86e72632af..bd3969efec 100644
--- a/var/spack/repos/builtin/packages/redland/package.py
+++ b/var/spack/repos/builtin/packages/redland/package.py
@@ -11,7 +11,7 @@ class Redland(AutotoolsPackage):
     """Redland RDF Library - librdf providing the RDF API and triple stores"""
 
     homepage = "https://librdf.org/"
-    url      = "http://download.librdf.org/source/redland-1.0.17.tar.gz"
+    url      = "https://download.librdf.org/source/redland-1.0.17.tar.gz"
 
     version('1.0.17', sha256='de1847f7b59021c16bdc72abb4d8e2d9187cd6124d69156f3326dd34ee043681')
     version('1.0.16', sha256='d9a274fc086e61119d5c9beafb8d05527e040ec86f4c0961276ca8de0a049dbd')
diff --git a/var/spack/repos/builtin/packages/repeatmodeler/package.py b/var/spack/repos/builtin/packages/repeatmodeler/package.py
index 68dbaca0a5..c40b288f95 100644
--- a/var/spack/repos/builtin/packages/repeatmodeler/package.py
+++ b/var/spack/repos/builtin/packages/repeatmodeler/package.py
@@ -11,7 +11,7 @@ class Repeatmodeler(Package):
        package."""
 
     homepage = "https://www.repeatmasker.org/RepeatModeler/"
-    url      = "http://www.repeatmasker.org/RepeatModeler/RepeatModeler-open-1.0.11.tar.gz"
+    url      = "https://www.repeatmasker.org/RepeatModeler/RepeatModeler-open-1.0.11.tar.gz"
 
     version('1.0.11', sha256='7ff0d588b40f9ad5ce78876f3ab8d2332a20f5128f6357413f741bb7fa172193')
 
diff --git a/var/spack/repos/builtin/packages/repeatscout/package.py b/var/spack/repos/builtin/packages/repeatscout/package.py
index acc854a47c..b330420f4a 100644
--- a/var/spack/repos/builtin/packages/repeatscout/package.py
+++ b/var/spack/repos/builtin/packages/repeatscout/package.py
@@ -12,7 +12,7 @@ class Repeatscout(MakefilePackage):
        P.A."""
 
     homepage = "https://www.repeatmasker.org/RepeatModeler/"
-    url      = "http://www.repeatmasker.org/RepeatScout-1.0.5.tar.gz"
+    url      = "https://www.repeatmasker.org/RepeatScout-1.0.5.tar.gz"
 
     version('1.0.5', sha256='bda6f782382f2b7dcb6a004b7da586d5046b3c12429b158e24787be62de6199c')
 
diff --git a/var/spack/repos/builtin/packages/rngstreams/package.py b/var/spack/repos/builtin/packages/rngstreams/package.py
index 3a9d973e84..f3f84a683c 100644
--- a/var/spack/repos/builtin/packages/rngstreams/package.py
+++ b/var/spack/repos/builtin/packages/rngstreams/package.py
@@ -10,6 +10,6 @@ class Rngstreams(AutotoolsPackage):
     """Multiple independent streams of pseudo-random numbers."""
 
     homepage = "https://statmath.wu.ac.at/software/RngStreams"
-    url      = "http://statmath.wu.ac.at/software/RngStreams/rngstreams-1.0.1.tar.gz"
+    url      = "https://statmath.wu.ac.at/software/RngStreams/rngstreams-1.0.1.tar.gz"
 
     version('1.0.1', sha256='966195febb9fb9417e4e361948843425aee12efc8b4e85332acbcd011ff2d9b0')
diff --git a/var/spack/repos/builtin/packages/rodinia/package.py b/var/spack/repos/builtin/packages/rodinia/package.py
index bfeaa06d15..8222b875d6 100644
--- a/var/spack/repos/builtin/packages/rodinia/package.py
+++ b/var/spack/repos/builtin/packages/rodinia/package.py
@@ -11,7 +11,7 @@ class Rodinia(MakefilePackage, CudaPackage):
        Accelerators"""
 
     homepage = "https://rodinia.cs.virginia.edu/doku.php"
-    url      = "http://www.cs.virginia.edu/~kw5na/lava/Rodinia/Packages/Current/rodinia_3.1.tar.bz2"
+    url      = "https://www.cs.virginia.edu/~kw5na/lava/Rodinia/Packages/Current/rodinia_3.1.tar.bz2"
 
     version('3.1', sha256='faebac7c11ed8f8fcf6bf2d7e85c3086fc2d11f72204d6dfc28dc5b2e8f2acfd')
 
diff --git a/var/spack/repos/builtin/packages/routino/package.py b/var/spack/repos/builtin/packages/routino/package.py
index f1f58956ff..edcf34cb48 100644
--- a/var/spack/repos/builtin/packages/routino/package.py
+++ b/var/spack/repos/builtin/packages/routino/package.py
@@ -9,7 +9,7 @@ from spack import *
 class Routino(MakefilePackage):
     """Routino is an application for finding a route between two points using
     the dataset of topographical information collected by
-    http://www.OpenStreetMap.org."""
+    https://www.OpenStreetMap.org/."""
 
     homepage = "https://www.routino.org"
     url      = "https://www.routino.org/download/routino-3.2.tgz"
diff --git a/var/spack/repos/builtin/packages/ruby/package.py b/var/spack/repos/builtin/packages/ruby/package.py
index c0deb2d5b3..8d8243b497 100644
--- a/var/spack/repos/builtin/packages/ruby/package.py
+++ b/var/spack/repos/builtin/packages/ruby/package.py
@@ -11,8 +11,8 @@ class Ruby(AutotoolsPackage):
     simplicity and productivity."""
 
     homepage = "https://www.ruby-lang.org/"
-    url      = "http://cache.ruby-lang.org/pub/ruby/2.2/ruby-2.2.0.tar.gz"
-    list_url = "http://cache.ruby-lang.org/pub/ruby/"
+    url      = "https://cache.ruby-lang.org/pub/ruby/2.2/ruby-2.2.0.tar.gz"
+    list_url = "https://cache.ruby-lang.org/pub/ruby/"
     list_depth = 1
 
     version('3.0.2', sha256='5085dee0ad9f06996a8acec7ebea4a8735e6fac22f22e2d98c3f2bc3bef7e6f1')
@@ -67,7 +67,7 @@ class Ruby(AutotoolsPackage):
         return match.group(1) if match else None
 
     def url_for_version(self, version):
-        url = "http://cache.ruby-lang.org/pub/ruby/{0}/ruby-{1}.tar.gz"
+        url = "https://cache.ruby-lang.org/pub/ruby/{0}/ruby-{1}.tar.gz"
         return url.format(version.up_to(2), version)
 
     def configure_args(self):
@@ -114,7 +114,7 @@ class Ruby(AutotoolsPackage):
         """ RubyGems updated their SSL certificates at some point, so
         new certificates must be installed after Ruby is installed
         in order to download gems; see
-        http://guides.rubygems.org/ssl-certificate-update/
+        https://guides.rubygems.org/ssl-certificate-update/
         for details.
         """
         if self.spec.satisfies("+openssl"):
diff --git a/var/spack/repos/builtin/packages/salmon-tddft/package.py b/var/spack/repos/builtin/packages/salmon-tddft/package.py
index f926c4bbae..ea5e887bb2 100755
--- a/var/spack/repos/builtin/packages/salmon-tddft/package.py
+++ b/var/spack/repos/builtin/packages/salmon-tddft/package.py
@@ -16,7 +16,7 @@ class SalmonTddft(CMakePackage):
     with norm-conserving pseudopotentials."""
 
     homepage = "https://salmon-tddft.jp"
-    url = "http://salmon-tddft.jp/download/SALMON-v.2.0.0.tar.gz"
+    url = "https://salmon-tddft.jp/download/SALMON-v.2.0.0.tar.gz"
 
     version('2.0.0', sha256='c3bb80bc5d338cba21cd8f345acbf2f2d81ef75af069a0a0ddbdc0acf358456c')
     version('1.2.1', sha256='a5045149e49abe9dd9edefe00cd1508a1323081bc3d034632176b728effdbaeb')
diff --git a/var/spack/repos/builtin/packages/scalasca/package.py b/var/spack/repos/builtin/packages/scalasca/package.py
index b172d19958..248c44f0d1 100644
--- a/var/spack/repos/builtin/packages/scalasca/package.py
+++ b/var/spack/repos/builtin/packages/scalasca/package.py
@@ -17,7 +17,7 @@ class Scalasca(AutotoolsPackage):
     """
 
     homepage = "https://www.scalasca.org"
-    url = "http://apps.fz-juelich.de/scalasca/releases/scalasca/2.1/dist/scalasca-2.1.tar.gz"
+    url = "https://apps.fz-juelich.de/scalasca/releases/scalasca/2.1/dist/scalasca-2.1.tar.gz"
     list_url = "https://scalasca.org/scalasca/front_content.php?idart=1072"
 
     version('2.6', sha256='b3f9cb1d58f3e25090a39da777bae8ca2769fd10cbd6dfb9a4887d873ee2441e')
diff --git a/var/spack/repos/builtin/packages/scan-for-matches/package.py b/var/spack/repos/builtin/packages/scan-for-matches/package.py
index 31a23510a7..90ea5756f8 100644
--- a/var/spack/repos/builtin/packages/scan-for-matches/package.py
+++ b/var/spack/repos/builtin/packages/scan-for-matches/package.py
@@ -11,7 +11,7 @@ class ScanForMatches(Package):
        or protein FASTA files."""
 
     homepage = "https://blog.theseed.org/servers/2010/07/scan-for-matches.html"
-    url      = "http://www.theseed.org/servers/downloads/scan_for_matches.tgz"
+    url      = "https://www.theseed.org/servers/downloads/scan_for_matches.tgz"
 
     version('2010-7-16', sha256='c6b17930efbdfbac28b57c3a0b4f8c26effb36c48988d82e41c81c6962e2d68f')
 
diff --git a/var/spack/repos/builtin/packages/scipoptsuite/package.py b/var/spack/repos/builtin/packages/scipoptsuite/package.py
index 300ede769c..744edf0970 100644
--- a/var/spack/repos/builtin/packages/scipoptsuite/package.py
+++ b/var/spack/repos/builtin/packages/scipoptsuite/package.py
@@ -16,7 +16,7 @@ class Scipoptsuite(CMakePackage):
     your current directory for the download file.  Alternatively,
     add this file to a mirror so that Spack can find it.  For
     instructions on how to set up a mirror, see
-    http://spack.readthedocs.io/en/latest/mirrors.html"""
+    https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "https://scipopt.org"
     url      = "file://{0}/scipoptsuite-7.0.1.tgz".format(os.getcwd())
diff --git a/var/spack/repos/builtin/packages/sctk/package.py b/var/spack/repos/builtin/packages/sctk/package.py
index 421ec76182..e3b9f272ef 100644
--- a/var/spack/repos/builtin/packages/sctk/package.py
+++ b/var/spack/repos/builtin/packages/sctk/package.py
@@ -14,16 +14,16 @@ class Sctk(Package):
         common scoring engine."""
 
     homepage = "https://www.nist.gov/itl/iad/mig/tools"
-    url      = "http://www.openslr.org/resources/4/sctk-2.4.10-20151007-1312Z.tar.bz2"
+    url      = "https://www.openslr.org/resources/4/sctk-2.4.10-20151007-1312Z.tar.bz2"
 
     version('2.4.10', sha256='9cef424ce3a899f83b9527dc6fa83badf1bb14151529a78580301dd248bd2bf9',
-            url='http://www.openslr.org/resources/4/sctk-2.4.10-20151007-1312Z.tar.bz2')
+            url='https://www.openslr.org/resources/4/sctk-2.4.10-20151007-1312Z.tar.bz2')
     version('2.4.9', sha256='262c92cca47755539dfa28add6120aa3ec4983b44b51f053f601e601c064617c',
-            url='http://www.openslr.org/resources/4/sctk-2.4.9-20141015-1634Z.tar.bz2')
+            url='https://www.openslr.org/resources/4/sctk-2.4.9-20141015-1634Z.tar.bz2')
     version('2.4.8', sha256='ca9c5164cd06439ff85e681bc94a02a67139c7111591c628667151d386a02d5b',
-            url='http://www.openslr.org/resources/4/sctk-2.4.8-20130429-2145.tar.bz2')
+            url='https://www.openslr.org/resources/4/sctk-2.4.8-20130429-2145.tar.bz2')
     version('2.4.0', sha256='73886bf3b879882a132141967ffe6b365178a2226390d2212f51a63e5df066e2',
-            url='http://www.openslr.org/resources/4/sctk-2.4.0-20091110-0958.tar.bz2')
+            url='https://www.openslr.org/resources/4/sctk-2.4.0-20091110-0958.tar.bz2')
 
     def install(self, spec, prefix):
         make('config')
diff --git a/var/spack/repos/builtin/packages/sentieon-genomics/package.py b/var/spack/repos/builtin/packages/sentieon-genomics/package.py
index e51583004d..abfd2dd437 100644
--- a/var/spack/repos/builtin/packages/sentieon-genomics/package.py
+++ b/var/spack/repos/builtin/packages/sentieon-genomics/package.py
@@ -20,7 +20,7 @@ class SentieonGenomics(Package):
     Spack will search your current directory for the download file.
     Alternatively, add this file to a mirror so that Spack can find it.
     For instructions on how to set up a mirror, see
-    http://spack.readthedocs.io/en/latest/mirrors.html"""
+    https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "https://www.sentieon.com/"
     url      = "file://{0}/sentieon-genomics-201808.01.tar.gz".format(os.getcwd())
diff --git a/var/spack/repos/builtin/packages/sfcgal/package.py b/var/spack/repos/builtin/packages/sfcgal/package.py
index 12ffc4af6b..fb864b45be 100644
--- a/var/spack/repos/builtin/packages/sfcgal/package.py
+++ b/var/spack/repos/builtin/packages/sfcgal/package.py
@@ -19,7 +19,7 @@ class Sfcgal(CMakePackage):
 
     version('1.3.7', sha256='30ea1af26cb2f572c628aae08dd1953d80a69d15e1cac225390904d91fce031b')
 
-    # Ref: http://oslandia.github.io/SFCGAL/installation.html
+    # Ref: https://oslandia.github.io/SFCGAL/installation.html
     depends_on('cgal@4.3: +core')
     depends_on('boost@1.54.0:')
     depends_on('mpfr@2.2.1:')
diff --git a/var/spack/repos/builtin/packages/signalp/package.py b/var/spack/repos/builtin/packages/signalp/package.py
index 73d69cf247..28ace7ef89 100644
--- a/var/spack/repos/builtin/packages/signalp/package.py
+++ b/var/spack/repos/builtin/packages/signalp/package.py
@@ -16,7 +16,7 @@ class Signalp(Package):
        Spack will search your current directory for the download file.
        Alternatively, add this file to a mirror so that Spack can find it.
        For instructions on how to set up a mirror, see
-       http://spack.readthedocs.io/en/latest/mirrors.html"""
+       https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "https://www.cbs.dtu.dk/services/SignalP/"
     url      = "file://{0}/signalp-4.1f.Linux.tar.gz".format(os.getcwd())
diff --git a/var/spack/repos/builtin/packages/simgrid/package.py b/var/spack/repos/builtin/packages/simgrid/package.py
index e22cd1d258..cbcbfb44f4 100644
--- a/var/spack/repos/builtin/packages/simgrid/package.py
+++ b/var/spack/repos/builtin/packages/simgrid/package.py
@@ -47,16 +47,16 @@ class Simgrid(CMakePackage):
             url='https://gforge.inria.fr/frs/download.php/file/36621/SimGrid-3.15.tar.gz')
     version('3.14.159', sha256='2d93db245c6ec8039ffe332a77531b836ad093d57f18ec3f7920fe98e3719f48',
             deprecated=True,
-            url='http://gforge.inria.fr/frs/download.php/file/36384/SimGrid-3.14.159.tar.gz')
+            url='https://gforge.inria.fr/frs/download.php/file/36384/SimGrid-3.14.159.tar.gz')
     version('3.13', sha256='7bcedd19492f9a32cc431840ad2688d0d6e4121982d6d26e0174b5c92b086121',
             deprecated=True,
-            url='http://gforge.inria.fr/frs/download.php/file/35817/SimGrid-3.13.tar.gz')
+            url='https://gforge.inria.fr/frs/download.php/file/35817/SimGrid-3.13.tar.gz')
     version('3.12', sha256='d397ee0273395dc687fbcd2601515e7142559801a3db387454d77e0e18cd7878',
             deprecated=True,
-            url='http://gforge.inria.fr/frs/download.php/file/35215/SimGrid-3.12.tar.gz')
+            url='https://gforge.inria.fr/frs/download.php/file/35215/SimGrid-3.12.tar.gz')
     version('3.11', sha256='6efb006e028e37f74a34fc37d585a8cb296720020cabad361d65662533f1600b',
             deprecated=True,
-            url='http://gforge.inria.fr/frs/download.php/file/33683/SimGrid-3.11.tar.gz')
+            url='https://gforge.inria.fr/frs/download.php/file/33683/SimGrid-3.11.tar.gz')
 
     version('develop', branch='master')
 
diff --git a/var/spack/repos/builtin/packages/sionlib/package.py b/var/spack/repos/builtin/packages/sionlib/package.py
index 52c83783bc..6a94116ba4 100644
--- a/var/spack/repos/builtin/packages/sionlib/package.py
+++ b/var/spack/repos/builtin/packages/sionlib/package.py
@@ -8,7 +8,7 @@ class Sionlib(AutotoolsPackage):
     """Scalable I/O library for parallel access to task-local files"""
 
     homepage = "https://www.fz-juelich.de/ias/jsc/EN/Expertise/Support/Software/SIONlib/_node.html"
-    url      = "http://apps.fz-juelich.de/jsc/sionlib/download.php?version=1.7.6"
+    url      = "https://apps.fz-juelich.de/jsc/sionlib/download.php?version=1.7.6"
 
     maintainers = ['pramodk']
 
diff --git a/var/spack/repos/builtin/packages/slepc/package.py b/var/spack/repos/builtin/packages/slepc/package.py
index 699dab7a93..9d6d956057 100644
--- a/var/spack/repos/builtin/packages/slepc/package.py
+++ b/var/spack/repos/builtin/packages/slepc/package.py
@@ -82,7 +82,7 @@ class Slepc(Package, CudaPackage, ROCmPackage):
     conflicts('+blopex', when='^petsc+int64')
 
     resource(name='blopex',
-             url='http://slepc.upv.es/download/external/blopex-1.1.2.tar.gz',
+             url='https://slepc.upv.es/download/external/blopex-1.1.2.tar.gz',
              sha256='0081ee4c4242e635a8113b32f655910ada057c59043f29af4b613508a762f3ac',
              destination=join_path('installed-arch-' + sys.platform + '-c-opt',
                                    'externalpackages'),
diff --git a/var/spack/repos/builtin/packages/slider/package.py b/var/spack/repos/builtin/packages/slider/package.py
index f64debcce1..824f2292f0 100644
--- a/var/spack/repos/builtin/packages/slider/package.py
+++ b/var/spack/repos/builtin/packages/slider/package.py
@@ -9,7 +9,7 @@ class Slider(MavenPackage):
     long-running data access applications in Hadoop."""
 
     homepage = "https://www.cloudera.com/products/open-source/apache-hadoop/apache-slider.html"
-    url      = "http://archive.apache.org/dist/incubator/slider/0.92.0-incubating/apache-slider-0.92.0-incubating-source-release.tar.gz"
+    url      = "https://archive.apache.org/dist/incubator/slider/0.92.0-incubating/apache-slider-0.92.0-incubating-source-release.tar.gz"
     list_url = "http://archive.apache.org/dist/incubator/slider"
     list_depth = 1
 
diff --git a/var/spack/repos/builtin/packages/snptest/package.py b/var/spack/repos/builtin/packages/snptest/package.py
index 062f9bc067..91a8d07377 100644
--- a/var/spack/repos/builtin/packages/snptest/package.py
+++ b/var/spack/repos/builtin/packages/snptest/package.py
@@ -11,7 +11,7 @@ class Snptest(Package):
        genome-wide studies."""
 
     homepage = "https://mathgen.stats.ox.ac.uk/genetics_software/snptest/snptest.html"
-    url = "http://www.well.ox.ac.uk/~gav/resources/snptest_v2.5.2_linux_x86_64_dynamic.tgz"
+    url = "https://www.well.ox.ac.uk/~gav/resources/snptest_v2.5.2_linux_x86_64_dynamic.tgz"
 
     version('2.5.2', sha256='1ffa3ebafa2c5db4866a38e01bb09f43df7973d053423ce67221cb3f8acb30f6')
 
diff --git a/var/spack/repos/builtin/packages/sofa-c/package.py b/var/spack/repos/builtin/packages/sofa-c/package.py
index 2b53d41274..b653342f5c 100644
--- a/var/spack/repos/builtin/packages/sofa-c/package.py
+++ b/var/spack/repos/builtin/packages/sofa-c/package.py
@@ -10,7 +10,7 @@ class SofaC(MakefilePackage):
     """Standards of Fundamental Astronomy (SOFA) library for ANSI C."""
 
     homepage = "http://www.iausofa.org/current_C.html"
-    url      = "http://www.iausofa.org/2018_0130_C/sofa_c-20180130.tar.gz"
+    url      = "https://www.iausofa.org/2018_0130_C/sofa_c-20180130.tar.gz"
 
     version('20180130', sha256='de09807198c977e1c58ea1d0c79c40bdafef84f2072eab586a7ac246334796db')
 
diff --git a/var/spack/repos/builtin/packages/sowing/package.py b/var/spack/repos/builtin/packages/sowing/package.py
index b6ab80d442..29d25b9050 100644
--- a/var/spack/repos/builtin/packages/sowing/package.py
+++ b/var/spack/repos/builtin/packages/sowing/package.py
@@ -13,7 +13,7 @@ class Sowing(AutotoolsPackage):
     """
 
     homepage = "https://www.mcs.anl.gov/petsc/index.html"
-    url = "http://ftp.mcs.anl.gov/pub/petsc/externalpackages/sowing-1.1.23-p1.tar.gz"
+    url = "https://ftp.mcs.anl.gov/pub/petsc/externalpackages/sowing-1.1.23-p1.tar.gz"
 
     version('1.1.26-p1', sha256='fa0bd07295e5d768f2c33c8ab32205cc6411d42cb40bde0700fb57f9ee31c3d9')
     version('1.1.25-p1', sha256='c3a5bb170fffeeb1405ec4c3a048744a528d2bef24de29b6ac5e970cfeaddab5')
diff --git a/var/spack/repos/builtin/packages/spark/package.py b/var/spack/repos/builtin/packages/spark/package.py
index 24f228bc12..be6bbf2d71 100644
--- a/var/spack/repos/builtin/packages/spark/package.py
+++ b/var/spack/repos/builtin/packages/spark/package.py
@@ -14,7 +14,7 @@ class Spark(Package):
     """
 
     homepage = "https://spark.apache.org"
-    url = "http://archive.apache.org/dist/spark/spark-2.0.0/spark-2.0.0-bin-without-hadoop.tgz"
+    url = "https://archive.apache.org/dist/spark/spark-2.0.0/spark-2.0.0-bin-without-hadoop.tgz"
 
     variant('hadoop', default=False,
             description='Build with Hadoop')
diff --git a/var/spack/repos/builtin/packages/spot/package.py b/var/spack/repos/builtin/packages/spot/package.py
index 6b15acf9a3..de874ab565 100644
--- a/var/spack/repos/builtin/packages/spot/package.py
+++ b/var/spack/repos/builtin/packages/spot/package.py
@@ -10,7 +10,7 @@ class Spot(AutotoolsPackage):
     """Spot is a C++11 library for omega-automata manipulation and model
        checking."""
     homepage = "https://spot.lrde.epita.fr/"
-    url      = "http://www.lrde.epita.fr/dload/spot/spot-1.99.3.tar.gz"
+    url      = "https://www.lrde.epita.fr/dload/spot/spot-1.99.3.tar.gz"
 
     version('2.9.4', sha256='e11208323baabe9b5f98098d4b9bb39803fb102a68abbbaf900f1fcd578f0f85')
     version('1.99.3', sha256='86964af559994af4451a8dca663a9e1db6e869ed60e747ab60ce72dddc31b61b')
diff --git a/var/spack/repos/builtin/packages/ssmtp/package.py b/var/spack/repos/builtin/packages/ssmtp/package.py
index 177a6043a2..4f0c18b65e 100644
--- a/var/spack/repos/builtin/packages/ssmtp/package.py
+++ b/var/spack/repos/builtin/packages/ssmtp/package.py
@@ -11,7 +11,7 @@ class Ssmtp(AutotoolsPackage):
     mail via the departmental mailhub from which they pick up their mail."""
 
     homepage = "https://salsa.debian.org/debian/ssmtp"
-    url = "http://deb.debian.org/debian/pool/main/s/ssmtp/ssmtp_2.64.orig.tar.bz2"
+    url = "https://deb.debian.org/debian/pool/main/s/ssmtp/ssmtp_2.64.orig.tar.bz2"
 
     version('2.64', sha256='22c37dc90c871e8e052b2cab0ad219d010fa938608cd66b21c8f3c759046fa36')
 
diff --git a/var/spack/repos/builtin/packages/sspace-longread/package.py b/var/spack/repos/builtin/packages/sspace-longread/package.py
index 79001c59d7..c0d7f84718 100644
--- a/var/spack/repos/builtin/packages/sspace-longread/package.py
+++ b/var/spack/repos/builtin/packages/sspace-longread/package.py
@@ -16,7 +16,7 @@ class SspaceLongread(Package):
        Spack will search your current directory for the download file.
        Alternatively, add this file to a mirror so that Spack can find it.
        For instructions on how to set up a mirror, see
-       http://spack.readthedocs.io/en/latest/mirrors.html"""
+       https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "https://www.baseclear.com/genomics/bioinformatics/basetools/SSPACE-longread"
     manual_download = True
diff --git a/var/spack/repos/builtin/packages/sspace-standard/package.py b/var/spack/repos/builtin/packages/sspace-standard/package.py
index 9b623228a1..27c8a8bef6 100644
--- a/var/spack/repos/builtin/packages/sspace-standard/package.py
+++ b/var/spack/repos/builtin/packages/sspace-standard/package.py
@@ -17,7 +17,7 @@ class SspaceStandard(Package):
        Spack will search your current directory for the download file.
        Alternatively, add this file to a mirror so that Spack can find it.
        For instructions on how to set up a mirror, see
-       http://spack.readthedocs.io/en/latest/mirrors.html"""
+       https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "https://www.baseclear.com/genomics/bioinformatics/basetools/SSPACE"
     url      = "file://{0}/41SSPACE-STANDARD-3.0_linux-x86_64.tar.gz".format(os.getcwd())
diff --git a/var/spack/repos/builtin/packages/sst-elements/package.py b/var/spack/repos/builtin/packages/sst-elements/package.py
index ac37716488..cf301fac35 100644
--- a/var/spack/repos/builtin/packages/sst-elements/package.py
+++ b/var/spack/repos/builtin/packages/sst-elements/package.py
@@ -26,7 +26,7 @@ class SstElements(AutotoolsPackage):
     version('develop',   branch='devel')
     version('master',  branch='master')
 
-    # Contact SST developers (http://github.com/sstsimulator)
+    # Contact SST developers (https://github.com/sstsimulator)
     # if your use case requires support for:
     #   - balar
     #   - OTF2
diff --git a/var/spack/repos/builtin/packages/stacks/package.py b/var/spack/repos/builtin/packages/stacks/package.py
index 68cbef188c..7a90e42cfc 100644
--- a/var/spack/repos/builtin/packages/stacks/package.py
+++ b/var/spack/repos/builtin/packages/stacks/package.py
@@ -11,7 +11,7 @@ class Stacks(AutotoolsPackage):
        sequences, such as those generated on the Illumina platform."""
 
     homepage = "https://catchenlab.life.illinois.edu/stacks/"
-    url      = "http://catchenlab.life.illinois.edu/stacks/source/stacks-1.46.tar.gz"
+    url      = "https://catchenlab.life.illinois.edu/stacks/source/stacks-1.46.tar.gz"
 
     version('2.53', sha256='ee1efceaeeeb7a39f0c2e804ad7c0a003094db28c9101120c38ddb02846e90fd')
     version('2.3b', sha256='a46786d8811a730ebcdc17891e89f50d4f4ae196734439dac86091f45c92ac72')
diff --git a/var/spack/repos/builtin/packages/startup-notification/package.py b/var/spack/repos/builtin/packages/startup-notification/package.py
index 5f2fbf9ce1..5b54b42c2b 100644
--- a/var/spack/repos/builtin/packages/startup-notification/package.py
+++ b/var/spack/repos/builtin/packages/startup-notification/package.py
@@ -11,7 +11,7 @@ class StartupNotification(AutotoolsPackage):
     freedesktop startup notification protocol."""
 
     homepage = "https://www.freedesktop.org/wiki/Software/startup-notification/"
-    url      = "http://www.freedesktop.org/software/startup-notification/releases/startup-notification-0.12.tar.gz"
+    url      = "https://www.freedesktop.org/software/startup-notification/releases/startup-notification-0.12.tar.gz"
 
     version('0.12', sha256='3c391f7e930c583095045cd2d10eb73a64f085c7fde9d260f2652c7cb3cfbe4a')
 
diff --git a/var/spack/repos/builtin/packages/stc/package.py b/var/spack/repos/builtin/packages/stc/package.py
index fea9442d1c..0d9e8d452a 100644
--- a/var/spack/repos/builtin/packages/stc/package.py
+++ b/var/spack/repos/builtin/packages/stc/package.py
@@ -11,7 +11,7 @@ class Stc(AutotoolsPackage):
     """STC: The Swift-Turbine Compiler"""
 
     homepage = 'http://swift-lang.org/Swift-T'
-    url      = 'http://swift-lang.github.io/swift-t-downloads/spack/stc-0.9.0.tar.gz'
+    url      = 'https://swift-lang.github.io/swift-t-downloads/spack/stc-0.9.0.tar.gz'
     git      = "https://github.com/swift-lang/swift-t.git"
 
     version('master', branch='master')
diff --git a/var/spack/repos/builtin/packages/stripack/package.py b/var/spack/repos/builtin/packages/stripack/package.py
index b5e8a2a3c0..406697b4e3 100644
--- a/var/spack/repos/builtin/packages/stripack/package.py
+++ b/var/spack/repos/builtin/packages/stripack/package.py
@@ -12,7 +12,7 @@ class Stripack(MakefilePackage):
     https://people.sc.fsu.edu/~jburkardt/f_src/stripack/stripack.html
 
     The original Fortran 77 package STRIPACK is available from netlib as algorithm number 772 at
-    http://www.netlib.org/toms/772.gz
+    https://www.netlib.org/toms/772.gz
     Dr. Renka's articles were published in the ACM Transactions on Mathematical Software, Vol. 23, No 3, September 1997
     https://dl.acm.org/doi/10.1145/275323.275329
     """
diff --git a/var/spack/repos/builtin/packages/structure/package.py b/var/spack/repos/builtin/packages/structure/package.py
index a1388f9c5a..a5880171eb 100644
--- a/var/spack/repos/builtin/packages/structure/package.py
+++ b/var/spack/repos/builtin/packages/structure/package.py
@@ -11,7 +11,7 @@ class Structure(MakefilePackage):
        data to investigate population structure."""
 
     homepage = "https://web.stanford.edu/group/pritchardlab/structure.html"
-    url      = "http://web.stanford.edu/group/pritchardlab/structure_software/release_versions/v2.3.4/structure_kernel_source.tar.gz"
+    url      = "https://web.stanford.edu/group/pritchardlab/structure_software/release_versions/v2.3.4/structure_kernel_source.tar.gz"
 
     version('2.3.4', sha256='f2b72b9189a514f53e921bbdc1aa3dbaca7ac34a8467af1f972c7e4fc9c0bb37')
 
diff --git a/var/spack/repos/builtin/packages/subversion/package.py b/var/spack/repos/builtin/packages/subversion/package.py
index e7d5d33a33..df9af3a49b 100644
--- a/var/spack/repos/builtin/packages/subversion/package.py
+++ b/var/spack/repos/builtin/packages/subversion/package.py
@@ -44,7 +44,7 @@ class Subversion(AutotoolsPackage):
     # Installation has race cases.
     parallel = False
 
-    # http://www.linuxfromscratch.org/blfs/view/svn/general/subversion.html
+    # https://www.linuxfromscratch.org/blfs/view/svn/general/subversion.html
     def configure_args(self):
         spec = self.spec
         args = [
diff --git a/var/spack/repos/builtin/packages/supernova/package.py b/var/spack/repos/builtin/packages/supernova/package.py
index 54cefd0052..7e259c62af 100644
--- a/var/spack/repos/builtin/packages/supernova/package.py
+++ b/var/spack/repos/builtin/packages/supernova/package.py
@@ -24,7 +24,7 @@ class Supernova(Package):
     supernova yourself. Spack will search your current directory for the
     download file. Alternatively, add this file yo a mirror so that Spack
     can find it. For instructions on how to set up a mirror, see
-    http://spack.readthedocs.io/en/latest/mirrors.html"""
+    https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "https://support.10xgenomics.com/de-novo-assembly/software/overview/latest/welcome"
     manual_download = True
diff --git a/var/spack/repos/builtin/packages/sympol/package.py b/var/spack/repos/builtin/packages/sympol/package.py
index 016cd8e76d..fda7f43aaa 100644
--- a/var/spack/repos/builtin/packages/sympol/package.py
+++ b/var/spack/repos/builtin/packages/sympol/package.py
@@ -10,7 +10,7 @@ from spack import *
 class Sympol(CMakePackage):
     """SymPol is a C++ tool to work with symmetric polyhedra"""
     homepage = "https://www.math.uni-rostock.de/~rehn/software/sympol.html"
-    url      = "http://www.math.uni-rostock.de/~rehn/software/sympol-0.1.8.tar.gz"
+    url      = "https://www.math.uni-rostock.de/~rehn/software/sympol-0.1.8.tar.gz"
 
     version('0.1.8', sha256='8f4c013fa563e696fc8c27c408fd1f3d47783639815e8141e3a99826f1f3d54f')
 
diff --git a/var/spack/repos/builtin/packages/targetp/package.py b/var/spack/repos/builtin/packages/targetp/package.py
index 32fc0c9739..c82c69d5ce 100644
--- a/var/spack/repos/builtin/packages/targetp/package.py
+++ b/var/spack/repos/builtin/packages/targetp/package.py
@@ -15,7 +15,7 @@ class Targetp(Package):
        Spack will search your current directory for the download file.
        Alternatively, add this file to a mirror so that Spack can find it.
        For instructions on how to set up a mirror, see
-       http://spack.readthedocs.io/en/latest/mirrors.html"""
+       https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "https://www.cbs.dtu.dk/services/TargetP/"
     url      = "file://{0}/targetp-1.1b.Linux.tar.gz".format(os.getcwd())
diff --git a/var/spack/repos/builtin/packages/task/package.py b/var/spack/repos/builtin/packages/task/package.py
index 5ff196e456..bfd2f24f51 100644
--- a/var/spack/repos/builtin/packages/task/package.py
+++ b/var/spack/repos/builtin/packages/task/package.py
@@ -9,7 +9,7 @@ from spack import *
 class Task(CMakePackage):
     """Feature-rich console based todo list manager"""
     homepage = "https://www.taskwarrior.org"
-    url      = "http://taskwarrior.org/download/task-2.4.4.tar.gz"
+    url      = "https://taskwarrior.org/download/task-2.4.4.tar.gz"
 
     version('2.5.1', sha256='d87bcee58106eb8a79b850e9abc153d98b79e00d50eade0d63917154984f2a15')
     version('2.4.4', sha256='7ff406414e0be480f91981831507ac255297aab33d8246f98dbfd2b1b2df8e3b')
diff --git a/var/spack/repos/builtin/packages/taskd/package.py b/var/spack/repos/builtin/packages/taskd/package.py
index 6c3b5d35e5..1493e89199 100644
--- a/var/spack/repos/builtin/packages/taskd/package.py
+++ b/var/spack/repos/builtin/packages/taskd/package.py
@@ -10,7 +10,7 @@ class Taskd(CMakePackage):
     """TaskWarrior task synchronization daemon"""
 
     homepage = "https://www.taskwarrior.org"
-    url      = "http://taskwarrior.org/download/taskd-1.1.0.tar.gz"
+    url      = "https://taskwarrior.org/download/taskd-1.1.0.tar.gz"
 
     version('1.1.0', sha256='7b8488e687971ae56729ff4e2e5209ff8806cf8cd57718bfd7e521be130621b4')
 
diff --git a/var/spack/repos/builtin/packages/tasmanian/package.py b/var/spack/repos/builtin/packages/tasmanian/package.py
index d11a973a06..c57b80bdad 100644
--- a/var/spack/repos/builtin/packages/tasmanian/package.py
+++ b/var/spack/repos/builtin/packages/tasmanian/package.py
@@ -27,7 +27,7 @@ class Tasmanian(CMakePackage, CudaPackage, ROCmPackage):
     version('5.1', sha256='b0c1be505ce5f8041984c63edca9100d81df655733681858f5cc10e8c0c72711')
 
     version('5.0', sha256='2540bb63dea987ab205f7b375aff41f320b1de9bd7f1d1064ef96b22eeda1251',
-            url='http://tasmanian.ornl.gov/documents/Tasmanian_v5.0.zip')
+            url='https://tasmanian.ornl.gov/documents/Tasmanian_v5.0.zip')
 
     variant('xsdkflags', default=False,
             description='enable XSDK defaults for Tasmanian')
diff --git a/var/spack/repos/builtin/packages/tcsh/package.py b/var/spack/repos/builtin/packages/tcsh/package.py
index 92559cade1..662eabc62d 100644
--- a/var/spack/repos/builtin/packages/tcsh/package.py
+++ b/var/spack/repos/builtin/packages/tcsh/package.py
@@ -16,7 +16,7 @@ class Tcsh(AutotoolsPackage):
 
     homepage = "https://www.tcsh.org/"
     url      = "http://ftp.funet.fi/pub/mirrors/ftp.astron.com/pub/tcsh/tcsh-6.20.00.tar.gz"
-    list_url = "http://ftp.funet.fi/pub/mirrors/ftp.astron.com/pub/tcsh/old/"
+    list_url = "https://ftp.funet.fi/pub/mirrors/ftp.astron.com/pub/tcsh/old/"
 
     version('6.22.02', sha256='ed287158ca1b00ba477e8ea57bac53609838ebcfd05fcb05ca95021b7ebe885b')
     version('6.21.00', sha256='c438325448371f59b12a4c93bfd3f6982e6f79f8c5aef4bc83aac8f62766e972')
diff --git a/var/spack/repos/builtin/packages/tealeaf/package.py b/var/spack/repos/builtin/packages/tealeaf/package.py
index e878e4f712..d4b338be81 100644
--- a/var/spack/repos/builtin/packages/tealeaf/package.py
+++ b/var/spack/repos/builtin/packages/tealeaf/package.py
@@ -16,7 +16,7 @@ class Tealeaf(MakefilePackage):
     """
 
     homepage = "https://uk-mac.github.io/TeaLeaf/"
-    url      = "http://downloads.mantevo.org/releaseTarballs/miniapps/TeaLeaf/TeaLeaf-1.0.tar.gz"
+    url      = "https://downloads.mantevo.org/releaseTarballs/miniapps/TeaLeaf/TeaLeaf-1.0.tar.gz"
 
     tags = ['proxy-app']
 
diff --git a/var/spack/repos/builtin/packages/termcap/package.py b/var/spack/repos/builtin/packages/termcap/package.py
index b03d8aae60..0e8b00b092 100644
--- a/var/spack/repos/builtin/packages/termcap/package.py
+++ b/var/spack/repos/builtin/packages/termcap/package.py
@@ -12,7 +12,7 @@ class Termcap(AutotoolsPackage):
     independent of the terminal type."""
 
     homepage = "https://www.gnu.org/software/termutils/manual/termcap-1.3/html_mono/termcap.html"
-    url      = "http://ftp.gnu.org/gnu/termcap/termcap-1.3.1.tar.gz"
+    url      = "https://ftp.gnu.org/gnu/termcap/termcap-1.3.1.tar.gz"
 
     version('1.3.1', sha256='91a0e22e5387ca4467b5bcb18edf1c51b930262fd466d5fda396dd9d26719100')
     version('1.3',   sha256='3eb4b98ae08408ca65dd9275f3c8e56e2feac1261fae914a9b21273db51cf000')
diff --git a/var/spack/repos/builtin/packages/tesseract/package.py b/var/spack/repos/builtin/packages/tesseract/package.py
index cee0285c56..88b0accdaf 100644
--- a/var/spack/repos/builtin/packages/tesseract/package.py
+++ b/var/spack/repos/builtin/packages/tesseract/package.py
@@ -40,7 +40,7 @@ class Tesseract(AutotoolsPackage):
     )
     resource(
         name=jars[2],
-        url='http://search.maven.org/remotecontent?filepath=javax/xml/bind/jaxb-api/2.3.1/jaxb-api-2.3.1.jar',
+        url='https://search.maven.org/remotecontent?filepath=javax/xml/bind/jaxb-api/2.3.1/jaxb-api-2.3.1.jar',
         sha256='88b955a0df57880a26a74708bc34f74dcaf8ebf4e78843a28b50eae945732b06',
         placement=jars[2],
         expand=False,
diff --git a/var/spack/repos/builtin/packages/texlive/package.py b/var/spack/repos/builtin/packages/texlive/package.py
index 0ef1b56edf..07ea816aae 100644
--- a/var/spack/repos/builtin/packages/texlive/package.py
+++ b/var/spack/repos/builtin/packages/texlive/package.py
@@ -20,7 +20,7 @@ class Texlive(AutotoolsPackage):
     around the world."""
 
     homepage = "https://www.tug.org/texlive"
-    url = 'http://ftp.math.utah.edu/pub/tex/historic/systems/texlive/2020/texlive-20200406-source.tar.xz'
+    url = 'https://ftp.math.utah.edu/pub/tex/historic/systems/texlive/2020/texlive-20200406-source.tar.xz'
     base_url = 'http://ftp.math.utah.edu/pub/tex/historic/systems/texlive/{year}/texlive-{version}-{dist}.tar.xz'
     list_url = 'http://ftp.math.utah.edu/pub/tex/historic/systems/texlive'
     list_depth = 1
@@ -213,7 +213,7 @@ class Texlive(AutotoolsPackage):
         # Using texlive's mirror system leads to mysterious problems,
         # in lieu of being able to specify a repository as a variant, hardwire
         # a particular (slow, but central) one for now.
-        _repository = 'http://ctan.math.washington.edu/tex-archive/systems/texlive/tlnet/'
+        _repository = 'https://ctan.math.washington.edu/tex-archive/systems/texlive/tlnet/'
         env = os.environ
         env['TEXLIVE_INSTALL_PREFIX'] = prefix
         perl = which('perl')
diff --git a/var/spack/repos/builtin/packages/the-silver-searcher/package.py b/var/spack/repos/builtin/packages/the-silver-searcher/package.py
index a16a39421f..7320b86b7d 100644
--- a/var/spack/repos/builtin/packages/the-silver-searcher/package.py
+++ b/var/spack/repos/builtin/packages/the-silver-searcher/package.py
@@ -10,7 +10,7 @@ class TheSilverSearcher(AutotoolsPackage):
     """Fast recursive grep alternative"""
 
     homepage = "https://geoff.greer.fm/ag/"
-    url      = "http://geoff.greer.fm/ag/releases/the_silver_searcher-0.32.0.tar.gz"
+    url      = "https://geoff.greer.fm/ag/releases/the_silver_searcher-0.32.0.tar.gz"
 
     version('2.2.0', sha256='d9621a878542f3733b5c6e71c849b9d1a830ed77cb1a1f6c2ea441d4b0643170')
     version('2.1.0', sha256='d4652bd91c3a05e87a15809c5f3f14ad2e5e1f80185af510e3fa4ad2038c15d4')
diff --git a/var/spack/repos/builtin/packages/tmhmm/package.py b/var/spack/repos/builtin/packages/tmhmm/package.py
index 8ab54c8ce6..4f87f0c85c 100644
--- a/var/spack/repos/builtin/packages/tmhmm/package.py
+++ b/var/spack/repos/builtin/packages/tmhmm/package.py
@@ -15,7 +15,7 @@ class Tmhmm(Package):
        Spack will search your current directory for the download file.
        Alternatively, add this file to a mirror so that Spack can find it.
        For instructions on how to set up a mirror, see
-       http://spack.readthedocs.io/en/latest/mirrors.html"""
+       https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "http://www.cbs.dtu.dk/cgi-bin/nph-sw_request?tmhmm"
     url      = "file://{0}/tmhmm-2.0c.Linux.tar.gz".format(os.getcwd())
diff --git a/var/spack/repos/builtin/packages/transabyss/package.py b/var/spack/repos/builtin/packages/transabyss/package.py
index 0813edef1c..b0638427c7 100644
--- a/var/spack/repos/builtin/packages/transabyss/package.py
+++ b/var/spack/repos/builtin/packages/transabyss/package.py
@@ -10,7 +10,7 @@ class Transabyss(Package):
     """De novo assembly of RNAseq data using ABySS"""
 
     homepage = "https://www.bcgsc.ca/platform/bioinfo/software/trans-abyss"
-    url      = "http://www.bcgsc.ca/platform/bioinfo/software/trans-abyss/releases/1.5.5/transabyss-1.5.5.zip"
+    url      = "https://www.bcgsc.ca/platform/bioinfo/software/trans-abyss/releases/1.5.5/transabyss-1.5.5.zip"
 
     version('1.5.5', sha256='7804961c13296c587a1b22180dd3f02091a4494cbbd04fc33c2060599caadb0b')
 
diff --git a/var/spack/repos/builtin/packages/trf/package.py b/var/spack/repos/builtin/packages/trf/package.py
index 805769dac3..9a2a912856 100644
--- a/var/spack/repos/builtin/packages/trf/package.py
+++ b/var/spack/repos/builtin/packages/trf/package.py
@@ -16,7 +16,7 @@ class Trf(AutotoolsPackage):
        Spack will search your current directory for the download file.
        Alternatively, add this file to a mirror so that Spack can find it.
        For instructions on how to set up a mirror, see
-       http://spack.readthedocs.io/en/latest/mirrors.html"""
+       https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "https://tandem.bu.edu/trf/trf.html"
     url      = "https://github.com/Benson-Genomics-Lab/TRF/archive/refs/tags/v4.09.1.tar.gz"
diff --git a/var/spack/repos/builtin/packages/triangle/package.py b/var/spack/repos/builtin/packages/triangle/package.py
index df2513de14..3b32018b41 100644
--- a/var/spack/repos/builtin/packages/triangle/package.py
+++ b/var/spack/repos/builtin/packages/triangle/package.py
@@ -14,7 +14,7 @@ class Triangle(Package):
        meshes."""
 
     homepage = "https://www.cs.cmu.edu/~quake/triangle.html"
-    url      = "http://www.netlib.org/voronoi/triangle.zip"
+    url      = "https://www.netlib.org/voronoi/triangle.zip"
 
     version('1.6', sha256='1766327add038495fa3499e9b7cc642179229750f7201b94f8e1b7bee76f8480')
 
diff --git a/var/spack/repos/builtin/packages/turbine/package.py b/var/spack/repos/builtin/packages/turbine/package.py
index f7b84e5f8b..160b2b8886 100644
--- a/var/spack/repos/builtin/packages/turbine/package.py
+++ b/var/spack/repos/builtin/packages/turbine/package.py
@@ -13,7 +13,7 @@ class Turbine(AutotoolsPackage):
     """Turbine: The Swift/T runtime"""
 
     homepage = 'http://swift-lang.org/Swift-T'
-    url      = 'http://swift-lang.github.io/swift-t-downloads/spack/turbine-1.3.0.tar.gz'
+    url      = 'https://swift-lang.github.io/swift-t-downloads/spack/turbine-1.3.0.tar.gz'
     git      = "https://github.com/swift-lang/swift-t.git"
     configure_directory = 'turbine/code'
 
diff --git a/var/spack/repos/builtin/packages/turbomole/package.py b/var/spack/repos/builtin/packages/turbomole/package.py
index 3c239098a7..ee7e14a6a4 100644
--- a/var/spack/repos/builtin/packages/turbomole/package.py
+++ b/var/spack/repos/builtin/packages/turbomole/package.py
@@ -18,7 +18,7 @@ class Turbomole(Package):
     Spack will search the current directory for this file. It is
     probably best to add this file to a Spack mirror so that it can be
     found from anywhere.  For information on setting up a Spack mirror
-    see http://spack.readthedocs.io/en/latest/mirrors.html"""
+    see https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "http://www.turbomole-gmbh.com/"
     manual_download = True
diff --git a/var/spack/repos/builtin/packages/unuran/package.py b/var/spack/repos/builtin/packages/unuran/package.py
index 32177270f4..a3635f71cb 100644
--- a/var/spack/repos/builtin/packages/unuran/package.py
+++ b/var/spack/repos/builtin/packages/unuran/package.py
@@ -10,7 +10,7 @@ class Unuran(AutotoolsPackage):
     """Universal Non-Uniform Random number generator."""
 
     homepage = "https://statmath.wu.ac.at/unuran"
-    url      = "http://statmath.wu.ac.at/unuran/unuran-1.8.1.tar.gz"
+    url      = "https://statmath.wu.ac.at/unuran/unuran-1.8.1.tar.gz"
 
     version('1.8.1', sha256='c270ae96857857dbac6450043df865e0517f52856ddbe5202fd35583b13c5193')
 
diff --git a/var/spack/repos/builtin/packages/usearch/package.py b/var/spack/repos/builtin/packages/usearch/package.py
index fdf7fb46fe..753c88b789 100644
--- a/var/spack/repos/builtin/packages/usearch/package.py
+++ b/var/spack/repos/builtin/packages/usearch/package.py
@@ -16,7 +16,7 @@ class Usearch(Package):
        Spack will search your current directory for the download file.
        Alternatively, add this file to a mirror so that Spack can find it.
        For instructions on how to set up a mirror, see
-       http://spack.readthedocs.io/en/latest/mirrors.html"""
+       https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "https://www.drive5.com/usearch/"
     manual_download = True
diff --git a/var/spack/repos/builtin/packages/vampirtrace/package.py b/var/spack/repos/builtin/packages/vampirtrace/package.py
index bef3b5ce71..93262285a1 100644
--- a/var/spack/repos/builtin/packages/vampirtrace/package.py
+++ b/var/spack/repos/builtin/packages/vampirtrace/package.py
@@ -12,7 +12,7 @@ class Vampirtrace(AutotoolsPackage):
     and threads (OpenMP, Pthreads)."""
 
     homepage = "https://tu-dresden.de/zih/forschung/projekte/vampirtrace"
-    url      = "http://wwwpub.zih.tu-dresden.de/~mlieber/dcount/dcount.php?package=vampirtrace&get=VampirTrace-5.14.4.tar.gz"
+    url      = "https://wwwpub.zih.tu-dresden.de/~mlieber/dcount/dcount.php?package=vampirtrace&get=VampirTrace-5.14.4.tar.gz"
 
     version('5.14.4', sha256='1719a1666dd274c221b781631958cae56aa8bcb3f22861fb4ba6526c1b465a30')
 
diff --git a/var/spack/repos/builtin/packages/velvet/package.py b/var/spack/repos/builtin/packages/velvet/package.py
index 62bfff72d9..026233c109 100644
--- a/var/spack/repos/builtin/packages/velvet/package.py
+++ b/var/spack/repos/builtin/packages/velvet/package.py
@@ -11,7 +11,7 @@ class Velvet(MakefilePackage):
        sequencing technologies."""
 
     homepage = "https://www.ebi.ac.uk/~zerbino/velvet/"
-    url      = "http://www.ebi.ac.uk/~zerbino/velvet/velvet_1.2.10.tgz"
+    url      = "https://www.ebi.ac.uk/~zerbino/velvet/velvet_1.2.10.tgz"
 
     version('1.2.10', sha256='884dd488c2d12f1f89cdc530a266af5d3106965f21ab9149e8cb5c633c977640')
 
diff --git a/var/spack/repos/builtin/packages/vizglow/package.py b/var/spack/repos/builtin/packages/vizglow/package.py
index 1e68e9632c..a37a781588 100644
--- a/var/spack/repos/builtin/packages/vizglow/package.py
+++ b/var/spack/repos/builtin/packages/vizglow/package.py
@@ -17,7 +17,7 @@ class Vizglow(Package):
     the EsgeeTech homepage and download VizGlow yourself. Spack will search
     your current directory for a file of this format. Alternatively, add this
     file to a mirror so that Spack can find it. For instructions on how to
-    set up a mirror, see http://spack.readthedocs.io/en/latest/mirrors.html"""
+    set up a mirror, see https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "https://esgeetech.com/products/vizglow-plasma-modeling/"
     manual_download = True
diff --git a/var/spack/repos/builtin/packages/wordnet/package.py b/var/spack/repos/builtin/packages/wordnet/package.py
index 30d932db41..ef0fd9b0b6 100644
--- a/var/spack/repos/builtin/packages/wordnet/package.py
+++ b/var/spack/repos/builtin/packages/wordnet/package.py
@@ -12,7 +12,7 @@ class Wordnet(AutotoolsPackage):
     expressing a distinct concept. """
 
     homepage = "https://wordnet.princeton.edu/"
-    url      = "http://wordnetcode.princeton.edu/3.0/WordNet-3.0.tar.gz"
+    url      = "https://wordnetcode.princeton.edu/3.0/WordNet-3.0.tar.gz"
 
     version('3.0', sha256='640db279c949a88f61f851dd54ebbb22d003f8b90b85267042ef85a3781d3a52')
 
diff --git a/var/spack/repos/builtin/packages/workrave/package.py b/var/spack/repos/builtin/packages/workrave/package.py
index 6098b37fe0..310e96a5b2 100644
--- a/var/spack/repos/builtin/packages/workrave/package.py
+++ b/var/spack/repos/builtin/packages/workrave/package.py
@@ -55,13 +55,13 @@ class Workrave(AutotoolsPackage):
     # https://github.com/rcaelers/workrave/issues/95
     m4files = ['ax_cxx_compile_stdcxx_11', 'ax_cxx_compile_stdcxx']
     resource(name=m4files[0],
-             url='http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_cxx_compile_stdcxx_11.m4',
+             url='https://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_cxx_compile_stdcxx_11.m4',
              sha256='d75fc9fe4502eea02e8c5bfb61b88a04cd08aa6d5bd757fe66e9a9a1e4781b46',
              expand=False,
              destination='',
              placement=m4files[0])
     resource(name=m4files[1],
-             url='http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_cxx_compile_stdcxx.m4',
+             url='https://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_cxx_compile_stdcxx.m4',
              sha256='0c08d2f64147f65eb7e255019102c1042ab695c60fd49add19793951a1279a1a',
              expand=False,
              destination='',
diff --git a/var/spack/repos/builtin/packages/wxwidgets/package.py b/var/spack/repos/builtin/packages/wxwidgets/package.py
index a439c4c944..828538f159 100644
--- a/var/spack/repos/builtin/packages/wxwidgets/package.py
+++ b/var/spack/repos/builtin/packages/wxwidgets/package.py
@@ -43,7 +43,7 @@ class Wxwidgets(AutotoolsPackage):
             '--disable-precomp-headers'
         ]
 
-        # see http://trac.wxwidgets.org/ticket/17639
+        # see https://trac.wxwidgets.org/ticket/17639
         if spec.satisfies('@:3.1.0') and sys.platform == 'darwin':
             options.extend([
                 '--disable-qtkit',
diff --git a/var/spack/repos/builtin/packages/xapian-core/package.py b/var/spack/repos/builtin/packages/xapian-core/package.py
index 096ccd3467..53867017c3 100644
--- a/var/spack/repos/builtin/packages/xapian-core/package.py
+++ b/var/spack/repos/builtin/packages/xapian-core/package.py
@@ -13,7 +13,7 @@ class XapianCore(AutotoolsPackage):
     supports a rich set of boolean query operators."""
 
     homepage = "https://xapian.org"
-    url      = "http://oligarchy.co.uk/xapian/1.4.3/xapian-core-1.4.3.tar.xz"
+    url      = "https://oligarchy.co.uk/xapian/1.4.3/xapian-core-1.4.3.tar.xz"
 
     version('1.4.11', sha256='9f16b2f3e2351a24034d7636f73566ab74c3f0729e9e0492934e956b25c5bc07')
     version('1.4.3',  sha256='7d5295511ca2de70463a29e75f6a2393df5dc1485bf33074b778c66e1721e475')
diff --git a/var/spack/repos/builtin/packages/xplor-nih/package.py b/var/spack/repos/builtin/packages/xplor-nih/package.py
index de95db7e57..c750e9e09e 100644
--- a/var/spack/repos/builtin/packages/xplor-nih/package.py
+++ b/var/spack/repos/builtin/packages/xplor-nih/package.py
@@ -15,7 +15,7 @@ class XplorNih(Package):
        Spack will search your current directory for the download file.
        Alternatively, add this file to a mirror so that Spack can find it.
        For instructions on how to set up a mirror, see
-       http://spack.readthedocs.io/en/latest/mirrors.html"""
+       https://spack.readthedocs.io/en/latest/mirrors.html"""
 
     homepage = "https://nmr.cit.nih.gov/xplor-nih/"
     manual_download = True
diff --git a/var/spack/repos/builtin/packages/xpmem/package.py b/var/spack/repos/builtin/packages/xpmem/package.py
index a5f56d74b0..adddcc3e82 100644
--- a/var/spack/repos/builtin/packages/xpmem/package.py
+++ b/var/spack/repos/builtin/packages/xpmem/package.py
@@ -11,7 +11,7 @@ class Xpmem(AutotoolsPackage):
     of another process into its virtual address space."""
 
     # The README file of the repository says that the development was
-    # transferred to a new repository on GitLab: http://gitlab.com/hjelmn/xpmem
+    # transferred to a new repository on GitLab: https://gitlab.com/hjelmn/xpmem
     # However, it looks like that the repository on GitHub has a more recent
     # version of the codebase.
     homepage = "https://github.com/hjelmn/xpmem"
diff --git a/var/spack/repos/builtin/packages/xz/package.py b/var/spack/repos/builtin/packages/xz/package.py
index a3e09291fd..6eced02bda 100644
--- a/var/spack/repos/builtin/packages/xz/package.py
+++ b/var/spack/repos/builtin/packages/xz/package.py
@@ -16,7 +16,7 @@ class Xz(AutotoolsPackage, SourceforgePackage):
 
     homepage = "https://tukaani.org/xz/"
     sourceforge_mirror_path = "lzmautils/files/xz-5.2.5.tar.bz2"
-    list_url = "http://tukaani.org/xz/old.html"
+    list_url = "https://tukaani.org/xz/old.html"
 
     executables = [r'^xz$']
 
diff --git a/var/spack/repos/builtin/packages/yasm/package.py b/var/spack/repos/builtin/packages/yasm/package.py
index e881f65949..e9278e325c 100644
--- a/var/spack/repos/builtin/packages/yasm/package.py
+++ b/var/spack/repos/builtin/packages/yasm/package.py
@@ -13,7 +13,7 @@ class Yasm(AutotoolsPackage):
        object formats."""
 
     homepage = "https://yasm.tortall.net"
-    url      = "http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz"
+    url      = "https://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz"
     git      = "https://github.com/yasm/yasm.git"
 
     version('develop', branch='master')
diff --git a/var/spack/repos/builtin/packages/zlib/package.py b/var/spack/repos/builtin/packages/zlib/package.py
index 28b73aa18e..7ca45d4215 100644
--- a/var/spack/repos/builtin/packages/zlib/package.py
+++ b/var/spack/repos/builtin/packages/zlib/package.py
@@ -13,7 +13,7 @@ class Zlib(Package):
 
     homepage = "https://zlib.net"
     # URL must remain http:// so Spack can bootstrap curl
-    url = "http://zlib.net/fossils/zlib-1.2.11.tar.gz"
+    url = "https://zlib.net/fossils/zlib-1.2.11.tar.gz"
 
     version('1.2.11', sha256='c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1')
     # Due to the bug fixes, any installations of 1.2.9 or 1.2.10 should be
author	Tamara Dahlgren <35777542+tldahlgren@users.noreply.github.com>	2021-09-13 09:21:35 -0700
committer	GitHub <noreply@github.com>	2021-09-13 09:21:35 -0700
commit	bafd84e191d66b5812c1e197bf9d207479bc49e7 (patch)
tree	55ed8f09bcc503a275a453a1368fb0498586e7f7
parent	1e08f31e1650995b7fae8abf4c367e8c7cd34259 (diff)
download	spack-bafd84e191d66b5812c1e197bf9d207479bc49e7.tar.gz spack-bafd84e191d66b5812c1e197bf9d207479bc49e7.tar.bz2 spack-bafd84e191d66b5812c1e197bf9d207479bc49e7.tar.xz spack-bafd84e191d66b5812c1e197bf9d207479bc49e7.zip