diff --git a/config.coffee b/config.coffee
index 0281b45e1..d67ff1c24 100644
--- a/config.coffee
+++ b/config.coffee
@@ -37,9 +37,7 @@ exports.config =
         # //# sourceMappingURL=/javascripts/app.js.map
         # So we remove the ones that have public in them.
         exec = require('child_process').exec
-        for file in files when /\.js/.test file.path
-          exec "perl -pi -e 's/\\/\\/# sourceMappingURL=public.*//g' #{file.path}"
-        exec c
+        exec "perl -pi -e 's/\\/\\/# sourceMappingURL=public.*//g' public/javascripts/*.js"
 
   files:
     javascripts: