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-rw-r--r--var/spack/repos/builtin/packages/alps/package.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/var/spack/repos/builtin/packages/alps/package.py b/var/spack/repos/builtin/packages/alps/package.py
index 002e2c0bd1..b75de1c5b1 100644
--- a/var/spack/repos/builtin/packages/alps/package.py
+++ b/var/spack/repos/builtin/packages/alps/package.py
@@ -33,6 +33,10 @@ class Alps(CMakePackage):
depends_on('py-scipy', type=('build', 'run'))
depends_on('py-matplotlib', type=('build', 'run'))
+ # use depends_on to help with dependency resolution
+ depends_on('py-numpy@:1.19', when='^python@:3.6.99')
+ depends_on('py-scipy@:1.5', when='^python@:3.6.99')
+
# fix for gcc@7:
patch('alps_newgcc.patch', when='%gcc@7:')