these 2 derivations will be built:
  /nix/store/xzw4qld2iqqlc5hzv78yy1fy08knmbdz-nixos-test-driver-pgmq.drv
  /nix/store/vjcg2hgvpsqpjbs04m6yr00kdss2hirw-vm-test-run-pgmq.drv