diff --git a/Makefile b/Makefile
index b0618ebe..c020ccb6 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@ DOMAIN   := schneegans.github.com
 ZIP_NAME := $(NAME)@$(DOMAIN).zip
 
 # Some of the recipes below depend on some of these files.
-JS_FILES       = $(shell find -type f -and \( -name "*.js" \))
+JS_FILES       = $(wildcard src/*.js extension.js prefs.js)
 UI_FILES       = $(shell find resources -type f -and \( -name "*.ui" \))
 RESOURCE_FILES = $(shell find resources -mindepth 2 -type f)
 LOCALES_PO     = $(wildcard po/*.po)