these 2 derivations will be built:
  /nix/store/09wxxvp298sc74avk89i484adi0l5hb5-nixos-test-driver-plpgsql_check.drv
  /nix/store/0d1lk7clp49q2q6yyv0izd9yjz543r5w-vm-test-run-plpgsql_check.drv