mbed-os/features/nanostack/sal-stack-nanostack/mbed_lib.json

{
    "name": "nanostack",
    "config": {
        "configuration": {
            "help": "Build time configuration. Refer to Handbook for valid values. Default: full stack",
            "value": "nanostack_full"
        }
    },
    "macros": ["NS_USE_EXTERNAL_MBED_TLS"]
}