Can you check if this file exists on your system:
/sys/class/gpio/gpiochip512
Basically the build script uses this file’s existence to check if it needs to link with the gpiod library (which is needed for gpio operations in bookworm):
https://github.com/OpenSprinkler/OpenSprinkler-Firmware/blob/master/build.sh#L41C11-L41C38