reproduce (this is a W=1 build):
        git remote add mtd https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git
        git fetch mtd nand/next
        git checkout mtd/nand/next
        b4 shazam https://lore.kernel.org/r/20241020132722.20565-2-SkyLake.Huang@mediatek.com
        # 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