Fix failure when we have a build script without build packages

diff --git a/mkosi/__init__.py b/mkosi/__init__.py
index 50d6cb0ee1424f5654d0fffaaef7dbbb4fdf308f..0efa1adab6e68aa7aaa7c6b8df8bb12cbe7950d0 100644 (file)
--- a/mkosi/__init__.py
+++ b/mkosi/__init__.py
@@ -1477,7 +1477,7 @@ def save_cache(state: MkosiState) -> None:
         else:
             shutil.move(state.root, final)
 
-        if state.config.build_script:
+        if state.config.build_script and (state.workspace / "build-overlay").exists():
             unlink_try_hard(build)
             shutil.move(state.workspace / "build-overlay", build)