@Profpatsch, thanks for your PR! By analyzing the history of the files in this pull request, we identified @edolstra, @bjornfor and @rickynils to be potential reviewers.

Thanks for noticing that. It might make sense to implement this, though. :) I have some bugfixes for the module coming up anyway due to (not configurable) VM suspend on host shutdown.

The problem is that on suspend, libvirtd saves the full path to the qemu exectuable in the nix store with which the VM was initially started. On host boot, this store path might have been garbage collected already i.e. if the VM has already been running since a few host system generations.

Is there any movement on this front? Looks like onShutdown still does nothing. I'm in favor of it being implemented, but barring that it may be best to remove it for now, as it's pretty misleading.

#49480 fixes this by actually using the option.