these 2 derivations will be built:
  /nix/store/mi2mhwl2w3j708vaqvrfv8y3jiydj9yp-nixos-test-driver-pgjwt.drv
  /nix/store/7krgmdimky5va676z9di5z4hgj8g2qr0-vm-test-run-pgjwt.drv