these 2 derivations will be built:
  /nix/store/hns167qwxqcy0r1g5d10nqmhfcsjyl7g-nixos-test-driver-pgjwt.drv
  /nix/store/8x0gpa5wsdidqcc3lqsgi914v70mw3qi-vm-test-run-pgjwt.drv