Nixpkgs is a collection of packages for the Nix package manager. It is periodically built and tested by the hydra build daemon as so-called channels. To get channel information via git, add nixpkgs-channels as a remote:

% git remote add channels git://github.com/NixOS/nixpkgs-channels.git

For stability and maximum binary package support, it is recommended to maintain custom changes on top of one of the channels, e.g. nixos-15.09 for the latest release and nixos-unstable for the latest successful build of master:

% git remote update channels
% git rebase channels/nixos-15.09

For pull-requests, please rebase onto nixpkgs master.

NixOS linux distribution source code is located inside nixos/ folder.

• NixOS installation instructions
• Documentation (Nix Expression Language chapter)
• Manual (How to write packages for Nix)
• Manual (NixOS)
• Continuous package builds for unstable/master
• Continuous package builds for 14.12 release
• Continuous package builds for 15.09 release
• Tests for unstable/master
• Tests for 14.12 release
• Tests for 15.09 release

Communication:

• Mailing list
• IRC - #nixos on freenode.net