these 2 derivations will be built:
  /nix/store/nriaj2zgxjxh6yy849j4xpkgk8cwqh4b-nixos-test-driver-plpgsql_check.drv
  /nix/store/i95lakznaky2bc3dsagccq05fcl4qakq-vm-test-run-plpgsql_check.drv