nix is: functional language, build system, package manager, os, ...The Nix ecosystem is a DevOps toolkit that takes a unique approach to package management and system configuration. Nix helps you make reproducible, declarative, and reliable systems. Domen is writing the Nix ecosystem guide at nix.dev
Nix shorts - A collection of short notes about Nix, down to what is immediately needed for users.
nix.dev - The Nix ecosystem guide
NixOS on ARM - for example, if you want to try it out on a Raspberry Pi