garnet/bin/mdns/service/meta/mdns.cmx

{
    "program": {
        "binary": "bin/mdns"
    },
    "sandbox": {
        "features": [
            "config-data"
        ],
        "services": [
            "fuchsia.net.SocketProvider",
            "fuchsia.netstack.Netstack"
        ]
    }
}