these 2 derivations will be built:
  /nix/store/yqzh14nkiv06iqx7rdii0ccz9kdj7zkb-nixos-test-driver-plpgsql_check.drv
  /nix/store/c7rckh780y29aslkg5j0k01hy22v9sx9-vm-test-run-plpgsql_check.drv