these 2 derivations will be built:
  /nix/store/7m4ncnq5mqdv25j2f5fz9k6yz8w7izcp-nixos-test-driver-pgmq.drv
  /nix/store/bqin4ydarw8ds8vl1nyqxzv0y4qpa39r-vm-test-run-pgmq.drv