src/sys/pkg/bin/pkg-cache/meta/pkg-cache.cmx

{
    "program": {
        "binary": "bin/pkg-cache"
    },
    "sandbox": {
        "pkgfs": [
            "ctl",
            "versions",
            "system"
        ],
        "services": [
            "fuchsia.logger.LogSink",
            "fuchsia.tracing.provider.Registry"
        ]
    }
}