reproduce (this is a W=1 build):
        # https://github.com/gourryinverse/linux/commit/4af770f6b4623768abd534b154c6d8136f601cac
        git remote add gourryinverse https://github.com/gourryinverse/linux
        git fetch --no-tags gourryinverse scratch/gourry/managed_nodes/rfc6-complete
        git checkout 4af770f6b4623768abd534b154c6d8136f601cac

        # 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 mm/