xbuild 0.4.1 has been released! We've been doing a lot of work on xbuild recently; this is the first "ready for serious use" release.
It's a collection of three tools - xvenv, xbuild, and xpython - you can use to create virtual environments, build binary wheels in those environments, and run code on device simulators.
For more details, check out the docs: https://xbuild.beeware.org