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-rw-r--r--var/spack/packages/python/package.py10
1 files changed, 5 insertions, 5 deletions
diff --git a/var/spack/packages/python/package.py b/var/spack/packages/python/package.py
index 23b528b089..8bffbf393c 100644
--- a/var/spack/packages/python/package.py
+++ b/var/spack/packages/python/package.py
@@ -60,16 +60,16 @@ class Python(Package):
module.python_lib_dir = os.path.join(ext_spec.prefix, self.python_lib_dir)
module.site_packages_dir = os.path.join(ext_spec.prefix, self.site_packages_dir)
- # Add site packages directory to the PYTHONPATH
- os.environ['PYTHONPATH'] = module.site_packages_dir
-
# Make the site packages directory if it does not exist already.
mkdirp(module.site_packages_dir)
- # Add dependent packages' site-packages directory to PYTHONPATH
+ # Set PYTHONPATH to include site-packages dir for the
+ # extension and any other python extensions it depends on.
+ python_paths = []
for d in ext_spec.traverse():
if d.package.extends(self.spec):
- os.environ['PYTHONPATH'] += ':' + os.path.join(d.prefix, self.site_packages_dir)
+ python_paths.append(os.path.join(d.prefix, self.site_packages_dir))
+ os.environ['PYTHONPATH'] = ':'.join(python_paths)
# ========================================================================