description: I recently made the switch to NixOS after using Arch for several years. NixOS is different from any other operating system I’ve ever used. It has a built-in declarative functional programming language ‘Nix’, that can be used for configuration, and package management.Lessons Learned Link to heading If you subscribe to the way NixOS is intended to be used, it makes it easy to manage a Linux system. Trying to dip your toe in halfway is when problems can arise.