these 3 derivations will be built:
  /nix/store/nhrh6msrdkzlp29927qypq85il1migyq-driverConfiguration.json.drv
  /nix/store/qsp6jzy0idcw5l910xa57iax573is2kv-nixos-test-driver-nix-grpc-farm.drv
  /nix/store/r7z2dy47f3xg7c1sfyfiwh5plwnb6p7n-vm-test-run-nix-grpc-farm.drv