## Installation Nix can be installed in multiple ways: 1. Install on macOS/Linux/WSL as a package manager. 2. Install NixOS, it's a Linux distribution that uses Nix to manage the entire system environment. This book aims to introduce the usage of NixOS & Flakes, so we just skip the content related only to Nix here. The installation process of NixOS is simple, and I won't go into details here. Please just go to the official download site to see more details: