{
    "additional-repositories": ["testing"],
    "mirror_config": {
        "custom_mirrors": [
            {
                "name": "my_mirror",
                "sign_check": "Optional",
                "sign_option": "TrustedOnly",
                "url": "example.com"
            }
        ],
        "mirror_regions": {
            "Australia": [
          "http://archlinux.mirror.digitalpacific.com.au/$repo/os/$arch"
            ]
        }
    }
}