Exclude **all** optional modules and use the `querySelectorAll`-based selector engine:
```bash
-grunt custom:-ajax,-css,-deprecated,-dimensions,-effects,-event-alias,-offset,-sizzle
+grunt custom:-ajax,-css,-deprecated,-dimensions,-effects,-event-alias,-offset,-wrap,-sizzle
```
For questions or requests regarding custom builds, please start a thread on the [Developing jQuery Core](https://forum.jquery.com/developing-jquery-core) section of the forum. Due to the combinatorics and custom nature of these builds, they are not regularly tested in jQuery's unit test process. The non-Sizzle selector engine currently does not pass unit tests because it is missing too much essential functionality.