pkg/front_end/test/macros/data/package_config.json

{
  "configVersion": 2,
  "packages": [
    {
      "name": "macro",
      "rootUri": "pkgs/macro/lib/"
    },
    {
      "name": "macro_builder",
      "rootUri": "pkgs/macro_builder/lib/"
    }
  ]
}