reproduce (this is a W=1 build):
        # https://github.com/intel/linux-intel-lts/commit/da780c4a075ba2deb05ae29f0af4a990578c7901
        git remote add intel-lts https://github.com/intel/linux-intel-lts.git
        git fetch --no-tags intel-lts 6.12/emt
        git checkout da780c4a075ba2deb05ae29f0af4a990578c7901
        # 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