The standalone builder ought to include externals used by your patchers, but it doesn’t always. It certainly won’t add externals that are only loaded dynamically (patch scripting, Javascript, Java, etc.)

If your externals aren’t getting included, either use "include file" or "include folder" to make sure. I tend to be pretty heavy-handed about this.

Alternately, you can also copy your externs into the app bundle. I don’t recall off-hand the exact location, nor what the equivalent for Windows is, but dig around the archives or experiment if you’d prefer that approach.