Nix ecosystem

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The Nix Ecosystem is a collection of technologies built around the Nix Package Manager, which uses a purely functional packaging language called the Nix Expression Language to specify reproducible build processes. Nix stores the results into hashed addresses, allowing multiple versions of the same package to live side by side. This allowed the creation of NixOS, a Linux distribution with all components built by Nix, and thus supporting reproducible and declarative system-wide configuration management as well as atomic upgrades and rollbacks. A community maintained package repository called Nixpkgs is the largest Nix package repository, and also hosts NixOS packages (known as modules). In addition to these the community developed NixOps, a Nix based deployment and provisioning tool, and Hydra, a Nix based continuous build system. There are also many other applications developed by the Nix community, utilizing and supporting these core technologies.