{ "name": "URR",
      "packages": [ "Urr" ],
      "description": "Simple UDP Request-Response protocol",
      "repository": "https://github.com/mirek-fidler/urr.git",
      "status": "stable",
      "category": "networking",
      "readme": "https://raw.githubusercontent.com/mirek-fidler/urr/master/README.md"
    }

Should this manifest be somehow provided in the source files, so it can be modified independently. Here is the modification:

UPPHUB_BEGIN
{
  "nests": [
      "https://raw.githubusercontent.com/mirek-fidler/Skylark/upp-hub/manifest.json",
  ]
}
UPPHUB_END