if [ "${EBUILD_PHASE}" == "prepare" ] && [ "${CATEGORY}/${PN}" == "x11-drivers/nvidia-drivers" ]; then
    (cd "${S}" && \
	    sed -i\
		-e 's/read_cr4/__read_cr4/g' \
		-e 's/write_cr4/__write_cr4/g' \
		kernel/*.[ch])
fi