diff --git a/var/spack/repos/builtin/packages/python/package.py b/var/spack/repos/builtin/packages/python/package.py
index 12b77813d1c..c5f0f23d6d6 100644
--- a/var/spack/repos/builtin/packages/python/package.py
+++ b/var/spack/repos/builtin/packages/python/package.py
@@ -531,6 +531,8 @@ def setup_dependent_package(self, module, dependent_spec):
         module.site_packages_dir = join_path(dependent_spec.prefix,
                                              self.site_packages_dir)
 
+        self.spec.home = self.home
+
         # Make the site packages directory for extensions
         if dependent_spec.package.is_extension:
             mkdirp(module.site_packages_dir)