diff --git a/build/tasks/build.js b/build/tasks/build.js
index 18d101f0b..3671b4d99 100644
--- a/build/tasks/build.js
+++ b/build/tasks/build.js
@@ -306,7 +306,7 @@ module.exports = function( grunt ) {
 				// the official slim build
 				.reduce( ( acc, elem ) => acc.concat(
 					elem === "slim" ?
-						[ "-ajax", "-effects" ] :
+						[ "-ajax", "-callbacks", "-deferred", "-effects" ] :
 						[ elem ]
 				), [] )