src/ledger/bin/meta/ledger.cmx

{
    "program": {
        "binary": "bin/app"
    },
    "sandbox": {
        "services": [
            "fuchsia.netconnector.NetConnector",
            "fuchsia.net.SocketProvider",
            "fuchsia.tracelink.Registry",
            "fuchsia.cobalt.LoggerFactory"
        ]
    }
}