reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git/commit/?id=6380a59c534ecab1462608a1f76490289a45a377
        git remote add dtor-input https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git
        git fetch --no-tags dtor-input next
        git checkout 6380a59c534ecab1462608a1f76490289a45a377
        # 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