Hello Stefan,
> Sorry, that was not quite correct. I sent a patch months back, which did not > make it into this ticket, which solved this ticket but depends on > <http://issues.guix.gnu.org/48314>. I turned the nfs-root-fs test into an nfs-full test that is based on your patch. It spawns a VM with an NFS server and another VM that mounts it. It should now be possible to reintroduce an nfs-root-fs test so that the client VM uses an NFS as its root directory. Thanks, Mathieu