Ah got it, thanks for that @nuccitheboss! Hadn’t seen the other thread (or forum, for that matter).
And yeah, I can indeed build successfully with LXD. As it happens, the issue I’m actually trying to solve is that my build works great locally (with LXD, or on the host directly), but fails on the CI/Launchpad builder. And I’m unfortunately not able to see the actual error logs there (thread: Any way to see "full execution log" on Launchpad builder?) - so I went on a mission to try to reproduce the error locally. And trying to build using multipass was an idea along that journey…