bin/network_time_service/meta/network_time_service.cmx

{
    "program": {
        "binary": "bin/app"
    },
    "sandbox": {
        "dev": [
            "class/rtc/000"
        ],
        "services": [
            "fuchsia.logger.LogSink",
            "fuchsia.net.LegacySocketProvider",
            "fuchsia.sys.Environment",
            "fuchsia.sys.Loader"
        ]
    }
}