This is weird, right? It’s also not working, but oddly the dkms-clang.patch is failing, not the cachyos sources.
The top one is the package you are building on your machine the bottom 2 are the source on the cachyos. Those don’t have to match.
Have you tried cleanbuilding the package? I just tried building that package and did not get that error.
Thanks! It took forever, but ultimately worked. Also thanks for the explanation. I need to get to know the AUR better, I guess.