Another Linux user here. While I don't have the time to properly playtest right now (just found the mod and decided that I wanted to try it in my game), I did have the time to quickly start up my game and see if the tool molds this mod adds are there - and they are. I can also stack knife tool heads and create sticks out of boards and firewood, so I'm assuming that the mod works on my Linux game, unless you're having a more specific issue than just "doesn't work", Nariel?