# apt install gcc-aarch64-linux-gnu binutils-aarch64-linux-gnu
To build DTB, variable DTIMGTOOL in build_kernel.sh script must contain the path for tool mkdtboimg.py.
$ build_kernel.sh sabrina .
or (but no dtb generation):
$ make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 sabrina_defconfig
$ make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 -j8 CONFIG_DEBUG_SECTION_MISMATCH=y