these 2 derivations will be built:
  /nix/store/s795czgh7xz9l6wjfs5qsb33d8q4glpw-nixos-test-driver-pgjwt.drv
  /nix/store/hmd7f2895yzbp37akpx7svgiy2rhyqzv-vm-test-run-pgjwt.drv