reproduce (this is a W=1 build):
        # https://github.com/l1k/linux/commit/2b921886c1475171d2408875478dcb02df2b8afe
        git remote add l1k https://github.com/l1k/linux
        git fetch --no-tags l1k mariusz-npem
        git checkout 2b921886c1475171d2408875478dcb02df2b8afe
        # 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