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-rw-r--r--release.nix4
1 files changed, 3 insertions, 1 deletions
diff --git a/release.nix b/release.nix
index dd5f1c4d37bc..4459bf165a50 100644
--- a/release.nix
+++ b/release.nix
@@ -36,7 +36,9 @@ let
 
         postUnpack = ''
           # Clean up when building from a working tree.
-          git -C $sourceRoot clean -fd
+          if [[ -d $sourceRoot/.git ]]; then
+            git -C $sourceRoot clean -fd
+          fi
         '';
 
         preConfigure = ''