these 2 derivations will be built:
  /nix/store/202kvc10z2vs36dxf4kv44ar99k2637k-nixos-test-driver-pg_stat_monitor.drv
  /nix/store/ijaj9q77jh2pz4cd308w1hgqzaccnd3n-vm-test-run-pg_stat_monitor.drv