Oh I had missed that one in the original post! How did you set the working directory, via IDE or via CMake? The CLion part definitely clears things up for me as well.
In any case, thank you for your help. Next time, I won’t suspect it’s an issue with my CMake, at least.
Not sure if my answer was actually helping or more confusing 
- There are ways to set the working directory via CMake, but they are IDE-specific; not sure if there is one for CLion!