Index: Gruntfile.js
===================================================================
--- Gruntfile.js	(revision 29821)
+++ Gruntfile.js	(working copy)
@@ -388,8 +489,8 @@
 			build: {
 				files: {
 					src: [
-						BUILD_DIR + '/**/*.js',
-						'!' + BUILD_DIR + '/wp-content/**/*.js'
+						BUILD_DIR + 'wp-{admin,includes}/**/*.js',
+						BUILD_DIR + 'wp-content/themes/twenty{ten,eleven,twelve,thirteen,fourteen,fifteen}/**/*.js'
 					]
 				}
 			}