diff --git a/action.yml b/action.yml
index 0c4da31..27953d7 100644
--- a/action.yml
+++ b/action.yml
@@ -230,7 +230,7 @@ runs:
         # silently producing an empty hash.
         echo "snapshot-hash=${{ hashFiles(format('{0}/{1}', inputs.working-directory, inputs.stack-yaml)) }}" >>"$GITHUB_OUTPUT"
         echo "package-hash=${{ hashFiles('**/package.yaml', '**/*.cabal') }}" >>"$GITHUB_OUTPUT"
-        echo "sources-hash=${{ hashFiles('**', '!**/.stack-work') }}" >>"$GITHUB_OUTPUT"
+        echo "sources-hash=${{ hashFiles('**', '!**/.stack-work', '!.git') }}" >>"$GITHUB_OUTPUT"
 
     - id: stack-query
       name: Set stack-query outputs