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-rw-r--r--lib/spack/spack/build_systems/python.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/spack/spack/build_systems/python.py b/lib/spack/spack/build_systems/python.py
index 666c73f739..4641f85172 100644
--- a/lib/spack/spack/build_systems/python.py
+++ b/lib/spack/spack/build_systems/python.py
@@ -113,6 +113,9 @@ class PythonExtension(spack.package_base.PackageBase):
return conflicts
def add_files_to_view(self, view, merge_map, skip_if_exists=True):
+ if not self.extendee_spec:
+ return super().add_files_to_view(view, merge_map, skip_if_exists)
+
bin_dir = self.spec.prefix.bin
python_prefix = self.extendee_spec.prefix
python_is_external = self.extendee_spec.external