src/ledger/bin/meta/ledger.cmx

{
    "program": {
        "binary": "bin/app"
    },
    "sandbox": {
        "services": [
            "fuchsia.net.NameLookup",
            "fuchsia.posix.socket.Provider",
            "fuchsia.overnet.Overnet",
            "fuchsia.tracing.provider.Registry"
        ]
    }
}