reproduce (this is a W=1 build):
        git checkout v6.16
        b4 shazam https://lore.kernel.org/r/20250730234544.4357-2-ouster@cs.stanford.edu
        # 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 prepare