these 2 derivations will be built:
  /nix/store/4lrnjnh981fi6gxf3wrw47xqcdgz944f-nixos-test-driver-wal2json.drv
  /nix/store/c74xh1c0rjpj63xkrlwrri09gplybs4k-vm-test-run-wal2json.drv