Ionic Lab - how to switch platforms when building/emulating/run

I know Ionic Lab is a project in progress but i’m curious:

I have both platforms installed and when i click Build or Emulate/Run it always does it for ios.
I removed ios and still still attempts to try to build for it (fails).

Anything i can configure?

Also, this project that i’ve created using Ionic Lab doesn’t respond to any ionic build ios commands which is odd.