I played Dota2 in NixOS for years, so i am not sure why steam wouldn't work for you(it uses FHS too). You can always ask for help in discourse/matrix channel.

I played Dota2 in NixOS for years, so i am not sure why steam wouldn't work for you(it uses FHS too). You can always ask for help in discourse/matrix channel. > since sometimes I want to get stuff done and not tinker with my system. Plenty of people do get their work done on NixOS, so good luck with that attitude.