Recently, I installed NixOS on one of my machines to explore the Nix ecosystem, and to learn how it makes the process of creating deterministic and reproducible builds efficient and simpler. This blog post series provides an introduction to the Nix package manager and how it works. What is Nix? Nix is a powerful, purely functional package manager designed to be a reliable and reproducible package-management system. Nix is also the primary package manager for NixOS and can also be installed as an additional package manager on Linux and Mac OS X.