anchor.diff:        }
       ) cfg.vgpus;
   
  +    services.udev.extraRules = ''
  +      SUBSYSTEM=="vfio", OWNER="root", GROUP="kvm"
  +    '';
  +
       systemd.services = mapAttrs' (name: value:
         nameValuePair "kvmgt-${name}" {
           description = "KVMGT VGPU ${name}";
  
positive.code:     virtualisation.kvmgt = {
        enable = mkEnableOption ''
          KVMGT (iGVT-g) VGPU support. Allows Qemu/KVM guests to share host's Intel integrated graphics card.
          Currently only one graphical device can be shared
        '';
        # multi GPU support is under the question
        device = mkOption {
  
negative.code:           and find info about device via <command>cat /sys/bus/pci/devices/*/mdev_supported_types/i915-GVTg_V5_4/description</command>
          '';
          example = {
            i915-GVTg_V5_8.uuid = "a297db4a-f4c2-11e6-90f6-d3b88d6c9525";
          };
        };
      };
  