reproduce (this is a W=1 build):
        # https://github.com/zen-kernel/zen-kernel/commit/359095094f9446de0bc3637a66a97c5c9e56d2ba
        git remote add zen https://github.com/zen-kernel/zen-kernel
        git fetch --no-tags zen 6.13/prjc
        git checkout 359095094f9446de0bc3637a66a97c5c9e56d2ba
        # 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 prepare