these 2 derivations will be built:
  /nix/store/01vkjhb6sxg296jszcmks119khmvqn4q-nixos-test-driver-wal2json.drv
  /nix/store/34dmsbglxkjgffas9q9n5pmcdypfgdf1-vm-test-run-wal2json.drv