these 2 derivations will be built:
  /nix/store/69rks66f1yy88jpc805ygg92r297q1zc-nixos-test-driver-pg_stat_monitor.drv
  /nix/store/3njmixsb75q5drzda5v2v9bk4a8mw0b5-vm-test-run-pg_stat_monitor.drv