reproduce (this is a W=1 build):
        # https://github.com/isilence/linux/commit/7224437921cd25a9eb2481390e5e26b37f620182
        git remote add isilence https://github.com/isilence/linux
        git fetch --no-tags isilence zcrx/v9-wip
        git checkout 7224437921cd25a9eb2481390e5e26b37f620182
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash