these 2 derivations will be built:
  /nix/store/jcx1mwi6zlqw0f6rqgk2whh9iydpd7hi-nixos-test-driver-plpgsql_check.drv
  /nix/store/40hrdlwqh2j1znmlymzmghiskc87yl11-vm-test-run-plpgsql_check.drv