@Saviq I figured it out. Seems it is only applied when a new VM is created. Just running snapcraft doesn’t change it. As a new snapcraft user (given Snaps are supposed to be “easy”), I had to go and learn about what multipass is, how to use that command to stop the VM. However, that didn’t work either. So, I had to delete the VM - but that just causes snapcraft to complain the VM is delete and suggest purging it (not sure why it couldn’t have done that itself). After purging the deleted multipass VM and re-running, it does indeed take the parameter. Bit of a minefield for new users (- especially since initially I’d just killed the qemu process and then was faced with figuring out how to re-start the multipass daemon, which I could never figure out and just had to reboot my host machine). Thanks for your response though.