mount("ext4", "EMMC", "/dev/block/mmcblk0p6", "/system");
ui_print("Update Boot image...");
show_progress(0.050000, 1);
assert(package_extract_file("boot.img", "/tmp/boot.img"),
       write_raw_image("/tmp/boot.img", "bootimg"),
       delete("/tmp/boot.img"));
show_progress(0.050000, 1);
unmount("/system");
