diff --git a/app/build.sh b/app/build.sh
index 19c92c2aba..033ecca6f1 100755
--- a/app/build.sh
+++ b/app/build.sh
@@ -266,6 +266,7 @@ fi
 # Merge preserved files from Firefox
 #
 # components
+rmdir components
 mv components-fx components
 
 mv defaults defaults-z