How can I build production by Ext JS 5 app, but keep separate the Ext JS library?

To improve caching between applications. I would like to keep separate the Ext JS library from my built code.

Mainly, my production index.html will looks similar to:

<script type="text/javascript" src="ext-all.js"></script>

<script type="text/javascript" src="MyApp-all.js"></script>

How do I easily get that result from: sencha app build production ?

How can I build production by Ext JS 5 app, but keep separate the Ext JS library?