set -e
set +e
if [ -n "$D" ]; then
    ln -sf Image.gz-dtb-4.4.133 $D/boot/Image.gz-dtb > /dev/null 2>&1
else
    ln -sf Image.gz-dtb-4.4.133 boot/Image.gz-dtb > /dev/null 2>&1
    if [ $? -ne 0 ]; then
        echo "Filesystem on boot/ doesn't support symlinks, falling back to copied image (Image.gz-dtb)."
        install -m 0644 boot/Image.gz-dtb-4.4.133 boot/Image.gz-dtb
    fi
fi
set -e