these 2 derivations will be built:
  /nix/store/r7z4zlyz3syplbz8l2sma9wmnlkscqid-nixos-test-driver-pgaudit.drv
  /nix/store/fm7bjl7b66688qinlvzyhafxrcbmss7l-vm-test-run-pgaudit.drv