bin/netemul_runner/meta/netemul_sandbox.cmx

{
    "program": {
        "binary": "bin/netemul_sandbox"
    },
    "sandbox": {
        "dev": [
            "misc",
            "class/ethernet"
        ],
        "services": [
            "fuchsia.sys.Environment",
            "fuchsia.sys.Loader",
            "fuchsia.sys.Launcher"
        ]
    }
}