I decided to get into N64 homebrew, to try and implement one idea I had in mind.

There is a FOSS library for this, LibDragon, as well as a still-in-development engine Pyrite64.

When installing LibDragon at Preview branch - you need to compile it from source, and point it to a N64_INST directory. This directory is usually /opt/libdragon/

I decided to go through an easy path and tried to install it from AUR to make updates easier. Big mistake.

PKGBUILD was malformed and pointed N64_INST at /usr/ instead.

I am pretty sure that some files in /usr/include/ got messed up. This caused a lot of trouble for me already.

I did try to fix my own mess. I did try pacman -Qqn | pacman -S - to redownload and reinstall every package in my system. I don't know if that helped much.

How do I restore the system files in Arch Linux and verify that they're now in proper shape?