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](https://nixos.org/nixos)
[](https://travis-ci.org/NixOS/nixpkgs) [](http://www.issuestats.com/github/nixos/nixpkgs) [](http://www.issuestats.com/github/nixos/nixpkgs)
Nixpkgs is a collection of packages for the [Nix](https://nixos.org/nix/) package manager. It is periodically build and tested by the [hydra](http://hydra.nixos.org/) build daemon as so-called channels. To get channel information via git, add [nixpkgs-channels](https://github.com/NixOS/nixpkgs-channels.git) as a remote `git remote add nixpkgs-channels https://github.com/NixOS/nixpkgs-channels.git`. It is recommended to maintain custom changes on top of the `nixos-unstable` branch of `nixpkgs-channels`. For pull-requests, please rebase onto nixpkgs master.
[NixOS](https://nixos.org/nixos/) linux distribution source code is located inside `nixos/` folder.
* [NixOS installation instructions](https://nixos.org/nixos/manual/#ch-installation)
* [Documentation (Nix Expression Language chapter)](https://nixos.org/nix/manual/#ch-expression-language)
* [Manual (How to write packages for Nix)](https://nixos.org/nixpkgs/manual/)
* [Manual (NixOS)](https://nixos.org/nixos/manual/)
* [Continuous package builds for unstable/master](https://hydra.nixos.org/jobset/nixos/trunk-combined)
* [Continuous package builds for 14.12 release](https://hydra.nixos.org/jobset/nixos/release-14.12)
* [Tests for unstable/master](https://hydra.nixos.org/job/nixos/trunk-combined/tested#tabs-constituents)
* [Tests for 14.12 release](https://hydra.nixos.org/job/nixos/release-14.12/tested#tabs-constituents)
* [Mailing list](http://lists.science.uu.nl/mailman/listinfo/nix-dev)
* [IRC - #nixos on freenode.net](irc://irc.freenode.net/#nixos)
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