Thank you very much, I will try that 
//EDIT: nice, it builds, and works as intended!
Moson is a proper AUR wizard!
//EDIT: I eventually found a tool a week later trying to help someone else here, called Input Remapper, that allows to do basically the same thing I was doing for my mouse, so thank again Moson for helping, but in the end I think I will now use this tool to remap mouse button and make mouse profiles for different use. It even works better as I had issues with imwheel for game specific profile I had to think backwards to have various profiles for various app. Now I can load profiles on the fly.