Building a Qt app for iOS

I have a Qt app that I would like to build for iOS, using Bitrise if possible. I tried installing Qt using the Homebrew step, but that route apparently does not give me the iOS port of Qt. The official Qt installers are not apparently scriptable in any (reasonable) way.

Is there some other way to get Qt for iOS into a Bitrise image so I can build, or am I out of luck for this configuration?