these 2 derivations will be built:
  /nix/store/9lpn8b8q9appi76g0xsnlzf1g6n1mrin-nixos-test-driver-plpgsql_check.drv
  /nix/store/dzg4x6l82h5bnhbbz4xk8lsbcacm1ja2-vm-test-run-plpgsql_check.drv