src/diagnostics/transit_bench/meta/transit_bench.cmx

{
    "program": {
        "binary": "test/transit_bench",
        "env_vars": [
            "CARGO_TARGET_DIR=/cache"
        ]
    },
    "sandbox": {
        "features": [
            "isolated-cache-storage"
        ],
        "services": [
            "fuchsia.logger.LogSink"
        ]
    }
}