prevents a call to ccache
diff --git a/python/mozbuild/mozbuild/controller/building.py b/python/mozbuild/mozbuild/controller/building.py
index bf7009a..011c012 100644
--- a/python/mozbuild/mozbuild/controller/building.py
+++ b/python/mozbuild/mozbuild/controller/building.py
@@ -570,6 +570,7 @@ class BuildMonitor(MozbuildObject):
             )
 
     def ccache_stats(self, ccache=None):
+        return None
         ccache_stats = None
 
         if ccache is None:
