[Nix-dev] nixos-rebuild build-vm: Can't find /dev/sda2

[Moritz Ulrich]

Hello,

I'm a happy NixOS user on a Thinkpad x230. It's lvm-on-luks, with
/boot on /dev/sda1 ("x230-boot") and a luks-volume on /dev/sda2
("luksroot"). Different lvm volumes get mounted via labels on / and
/home:

boot.luks = {
  enable = true;
  devices = [
    {name = "luksroot";
     device = "/dev/sda2";
     allowDiscards = true;
   }];
};

fileSystems."/".label = "x230-root";
fileSystems."/boot".label = "x230-boot";
fileSystems."/home".label = "x230-home";
fileSystems."/tmp" = { device = "tmpfs"; fsType = "tmpfs"; };

Everything works fine when running on bare metal, starting a virtual
machine built via `nixos-rebuild build-vm' stops while booting:

Device /dev/sda2 doesn't exist or access denied.
starting device mapper and LVM
  No Volume groups found
failed to resume


Can anyone help me with this?

Cheers
Moritz Ulrich