bug#44353: [PATCH version-1.2.0 v2] guix: system: Add a new '--non-volatile' option for disk-image.

[Mathieu Othacehe]

Hey,

> Speaking of which, can we remove ‘system-disk-image-in-vm’?  It has zero
> users now.

Sure, I also need to find some time to route "vm-image", "vm" and
possibly "docker-image" commands to new image API.

Thanks,

Mathieu