these 4 derivations will be built:
  /nix/store/s124w2clry64s60blasg7i29svsj1nj7-test-script.drv
  /nix/store/gd1jjl13860x0qxfyq3f0w8djml6dr4v-driverConfiguration.json.drv
  /nix/store/whvss9r09d5ww5c1afqxavncrk9mh7ys-nixos-test-driver-postgis.drv
  /nix/store/yya0svzbim86x7xhy6jfrkldhq1im6nw-vm-test-run-postgis.drv