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-rw-r--r--lib/spack/docs/conf.py1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/spack/docs/conf.py b/lib/spack/docs/conf.py
index 5e2795cf49..2b58223e1d 100644
--- a/lib/spack/docs/conf.py
+++ b/lib/spack/docs/conf.py
@@ -107,6 +107,7 @@ extensions = [
'sphinx.ext.intersphinx',
'sphinx.ext.napoleon',
'sphinx.ext.todo',
+ 'sphinx.ext.viewcode',
'sphinxcontrib.programoutput',
]