reproduce (this is a W=1 build):
        # https://github.com/zen-kernel/zen-kernel/commit/02b4d790bb05e24e7408a147f33e4e9ca0b805fa
        git remote add zen https://github.com/zen-kernel/zen-kernel
        git fetch --no-tags zen 6.14/zen-sauce
        git checkout 02b4d790bb05e24e7408a147f33e4e9ca0b805fa
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=um olddefconfig
        make W=1 O=build_dir ARCH=um SHELL=/bin/bash