these 2 derivations will be built:
  /nix/store/gjmhss0pbwswhx7zkl0mqiwx3jfqsb9q-nixos-test-driver-pgjwt.drv
  /nix/store/1fpp4lhpkiywy8lhamijldxhzh4v0bv7-vm-test-run-pgjwt.drv