these 2 derivations will be built:
  /nix/store/z9qnd3d080d1im6v04g8lpvw2w29h252-nixos-test-driver-pgroonga.drv
  /nix/store/n8pz4vs8v3n83pnr5wlf3z5kwdz4yg6n-vm-test-run-pgroonga.drv