Fix need_cache_trees()

diff --git a/mkosi/__init__.py b/mkosi/__init__.py
index 3ee494a008ea870ff5701ce07f0ef47674f8b0ee..722b398647c36616003bfeb0f9ecfe7e95141a47 100644 (file)
--- a/mkosi/__init__.py
+++ b/mkosi/__init__.py
@@ -3332,7 +3332,7 @@ def need_cache_trees(state: MkosiState) -> bool:
     if state.config.force > 1:
         return True
 
-    return not cache_tree_path(state.config, is_final_image=True).exists() or not cache_tree_path(state.config, is_final_image=False).exists()
+    return not cache_tree_path(state.config, is_final_image=True).exists() or state.config.build_script is not None and not cache_tree_path(state.config, is_final_image=False).exists()
 
 
 def remove_artifacts(state: MkosiState, for_cache: bool = False) -> None: