reproduce (this is a W=1 build):
        # https://github.com/jcmvbkbc/linux-xtensa/commit/963c678969c7db8aa9be578713ebd9adf4500d0b
        git remote add jcmvbkbc-xtensa https://github.com/jcmvbkbc/linux-xtensa
        git fetch --no-tags jcmvbkbc-xtensa xtensa-6.11-rc6-esp32
        git checkout 963c678969c7db8aa9be578713ebd9adf4500d0b
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/net/wireless/espressif/esp32-ng/