Missing directory libdigiapix

I’ve gone through the Get Started steps for the CC MP13 module, built Yocto Linux and loaded it onto the module. I’m now in the Develop Applications section. I selected “Develop with VS Core” and installed VS Code per the instructions. Next is to download the GPIO Example app, build it, and load onto the module.

When I try to build the app I get compiler error :No such file or directory exists” for this statement in main.c:

#include <libdigiapix/gpio.h>

The directory named libdigiapix is located in at least 22 places on my PC. This seems like a path issue, but which path?