reproduce (this is a W=1 build):
        git checkout 00976ad5271999ba06d24319fd1031b178aff832
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/ fs/ net/ sound/core/