Hello, I used https://www.udoo.org/docs-neo/Advanced_Topics/Compile_Android_From_Source.html after use "make bootimage" command I am getting the following issue can anybody suggest the solution No private recovery resources for TARGET_DEVICE udooneo_6sx build/core/main.mk:1038: warning: overriding commands for target `clean' external/tools/iw/Makefile:126: warning: ignoring old commands for target `clean' make -C kernel_imx -j2 uImage ARCH=arm CROSS_COMPILE=`pwd`/prebuilts/gcc/linux-x86/arm/arm-eabi-5.3/bin/arm-eabi- LOADADDR=0x80008000 O=`pwd`/out/target/product/udooneo_6sx/obj/KERNEL_OBJ if [ ! -e include/config/auto.conf ]; then make -f /home/hiten/myandroid/kernel_imx/Makefile silentoldconfig ; fi CHK include/config/kernel.release GEN /home/hiten/myandroid/out/target/product/udooneo_6sx/obj/KERNEL_OBJ/Makefile CHK include/generated/uapi/linux/version.h if [ ! -e include/config/auto.conf ]; then make -f /home/hiten/myandroid/kernel_imx/Makefile silentoldconfig ; fi Using /home/hiten/myandroid/kernel_imx as source for kernel /home/hiten/myandroid/kernel_imx is not clean, please run 'make mrproper' in the '/home/hiten/myandroid/kernel_imx' directory. make[2]: *** [prepare3] Error 1 make[1]: *** [sub-make] Error 2 make: *** [out/target/product/udooneo_6sx/kernel] Error 2 #### make failed to build some targets (01:31 (mm:ss)) #### Thanks,