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nixpkgs

2nd chunk of `README.md`
a877d53d4e482c1dde8df54464771331e8aa0b6452a5e7a40000000100000e02
* [Matrix Chat](https://matrix.to/#/#space:nixos.org)
* [NixOS Weekly](https://weekly.nixos.org/)
* [Official wiki](https://wiki.nixos.org/)
* [Community-maintained list of ways to get in touch](https://wiki.nixos.org/wiki/Get_In_Touch#Chat) (Discord, Telegram, IRC, etc.)

# Other Project Repositories

The sources of all official Nix-related projects are in the [NixOS
organization on GitHub](https://github.com/NixOS/). Here are some of
the main ones:

* [Nix](https://github.com/NixOS/nix) - the purely functional package manager
* [NixOps](https://github.com/NixOS/nixops) - the tool to remotely deploy NixOS machines
* [nixos-hardware](https://github.com/NixOS/nixos-hardware) - NixOS profiles to optimize settings for different hardware
* [Nix RFCs](https://github.com/NixOS/rfcs) - the formal process for making substantial changes to the community
* [NixOS homepage](https://github.com/NixOS/nixos-homepage) - the [NixOS.org](https://nixos.org) website
* [hydra](https://github.com/NixOS/hydra) - our continuous integration system
* [NixOS Artwork](https://github.com/NixOS/nixos-artwork) - NixOS artwork

# Continuous Integration and Distribution

Nixpkgs and NixOS are built and tested by our continuous integration
system, [Hydra](https://hydra.nixos.org/).

* [Continuous package builds for unstable/master](https://hydra.nixos.org/jobset/nixos/trunk-combined)
* [Continuous package builds for the NixOS 24.11 release](https://hydra.nixos.org/jobset/nixos/release-24.11)
* [Tests for unstable/master](https://hydra.nixos.org/job/nixos/trunk-combined/tested#tabs-constituents)
* [Tests for the NixOS 24.11 release](https://hydra.nixos.org/job/nixos/release-24.11/tested#tabs-constituents)

Artifacts successfully built with Hydra are published to cache at
https://cache.nixos.org/. When successful build and test criteria are
met, the Nixpkgs expressions are distributed via [Nix
channels](https://nix.dev/manual/nix/stable/command-ref/nix-channel.html).

# Contributing

Nixpkgs is among the most active projects on GitHub. While thousands
of open issues and pull requests might seem a lot at first, it helps
consider it in the context of the scope of the project. Nixpkgs
describes how to build tens of thousands of pieces of software and implements a
Linux distribution. The [GitHub Insights](https://github.com/NixOS/nixpkgs/pulse)
page gives a sense of the project activity.

Community contributions are always welcome through GitHub Issues and
Pull Requests.

For more information about contributing to the project, please visit
the [contributing page](CONTRIBUTING.md).

# Donations

The infrastructure for NixOS and related projects is maintained by a
nonprofit organization, the [NixOS
Foundation](https://nixos.org/nixos/foundation.html). To ensure the
continuity and expansion of the NixOS infrastructure, we are looking
for donations to our organization.

You can donate to the NixOS foundation through [SEPA bank
transfers](https://nixos.org/donate.html) or by using Open Collective:

<a href="https://opencollective.com/nixos#support"><img src="https://opencollective.com/nixos/tiers/supporter.svg?width=890" /></a>

# License

Nixpkgs is licensed under the [MIT License](COPYING).

Note: MIT license does not apply to the packages built by Nixpkgs,
merely to the files in this repository (the Nix expressions, build
scripts, NixOS modules, etc.). It also might not apply to patches
included in Nixpkgs, which may be derivative works of the packages to
which they apply. The aforementioned artifacts are all covered by the
licenses of the respective packages.

Title: NixOS Project Repositories, CI/CD, Contributing, Donations, and License
Summary
This section lists official Nix-related projects on GitHub, including Nix, NixOps, nixos-hardware, Nix RFCs, the NixOS homepage, Hydra, and NixOS Artwork. It also describes the continuous integration system, Hydra, used for building and testing Nixpkgs and NixOS, and the distribution of packages via Nix channels. Furthermore, it encourages community contributions through GitHub, provides a link to the contributing page, and mentions the NixOS Foundation's need for donations. Finally, it specifies that Nixpkgs is licensed under the MIT License, clarifying that this license applies to the files within the repository and not necessarily to the packages built by Nixpkgs themselves.