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-rw-r--r--lib/spack/spack/mixins.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/spack/spack/mixins.py b/lib/spack/spack/mixins.py
index 189c3947ef..ef1d2b7916 100644
--- a/lib/spack/spack/mixins.py
+++ b/lib/spack/spack/mixins.py
@@ -93,7 +93,7 @@ def filter_compiler_wrappers(*files, **kwargs):
replacements = []
for idx, (env_var, compiler_path) in enumerate(compiler_vars):
- if env_var in os.environ:
+ if env_var in os.environ and compiler_path is not None:
# filter spack wrapper and links to spack wrapper in case
# build system runs realpath
wrapper = os.environ[env_var]