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'''Nixpkgs''' is the largest repository of [[Nix]] packages and [[NixOS]] modules. The repository is [https://github.com/nixos/nixpkgs hosted on GitHub] and maintained by the community, with official backing from the [[NixOS Foundation]].
'''Nixpkgs''' is the largest repository of [[Nix]] packages and [[NixOS]] modules. The repository is [https://github.com/nixos/nixpkgs hosted on GitHub] and maintained by the community, with official backing from the [[NixOS Foundation]].


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To search among available packages and options, see [[Searching packages]].
To search among available packages and options, see [[Searching packages]].


As highlighted in [https://nixos.org/blog/announcements.html#21.05  the announcement] of the NixOS 21.05 release, ''"NixOS is already known as [https://repology.org/repositories/statistics/newest the most up to date distribution] and is [https://repology.org/repositories/statistics/total in the top three by total number of packages]."'' This is thanks to the community's continued dedication to making Nixpkgs the preeminent Linux package repository.
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As highlighted in [https://nixos.org/blog/announcements/2024/nixos-2411/ the announcement] of the NixOS 24.11 release, ''"NixOS is already known as [https://repology.org/repositories/statistics/newest the most up to date distribution] while also being [https://repology.org/repositories/statistics/total the distribution with the most packages]."'' This is thanks to the community's continued dedication to making Nixpkgs the preeminent Linux package repository.


== Subpages ==
== Subpages == <!--T:4-->


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There are a number of articles especially related to working with <tt>nixpkgs</tt>:
There are a number of articles especially related to working with <tt>nixpkgs</tt>:
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{{Special:PrefixIndex/{{FULLPAGENAME}}/ |hideredirects=1 |stripprefix=1}}


== Releases ==
== Releases == <!--T:6-->


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{{main|Channel branches}}
{{main|Channel branches}}


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The packages and modules hosted on Nixpkgs are distributed through various [[channel branches]] intended for particular use-cases. In practice they are differentiated by the level of testing updates must pass on the official [https://nixos.org/hydra/manual/#idm140737315980672 nixos.org Hydra instance] and the number of updates they receive.
The packages and modules hosted on Nixpkgs are distributed through various [[channel branches]] intended for particular use-cases. In practice they are differentiated by the level of testing updates must pass on the official [https://nixos.org/hydra/manual/#idm140737315980672 nixos.org Hydra instance] and the number of updates they receive.


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For [[NixOS]] users, <code>nixos-unstable</code> channel branch is the rolling release, where packages pass build tests and [[NixOS VM tests|integration tests on a VM]], and are tested from the perspective of being an operative system (this means things like the [[Xorg|X server]], [[KDE]], various servers, and lower level details like installing [[Bootloader|bootloaders]] and running the NixOS installation steps are also tested).
For [[NixOS]] users, <code>nixos-unstable</code> channel branch is the rolling release, where packages pass build tests and [[NixOS VM tests|integration tests on a VM]], and are tested from the perspective of being an operative system (this means things like the [[Xorg|X server]], [[KDE]], various servers, and lower level details like installing [[Bootloader|bootloaders]] and running the NixOS installation steps are also tested).


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For standalone [[Nix]] users, <code>nixpkgs-unstable</code> channel branch is the rolling release, where packages pass only basic build tests and are upgraded continuously.
For standalone [[Nix]] users, <code>nixpkgs-unstable</code> channel branch is the rolling release, where packages pass only basic build tests and are upgraded continuously.


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Both [[NixOS]] and [[Nix]] users can use stable channel branches - the latest being {{nixos:latest}} - to receive only conservative updates for fixing critical bugs and security vulnerabilities. Stable channel branches are released bi-annually at the end of May and the end of November.  
Both [[NixOS]] and [[Nix]] users can use stable channel branches - the latest being {{nixos:latest}} - to receive only conservative updates for fixing critical bugs and security vulnerabilities. Stable channel branches are released bi-annually at the end of May and the end of November.  


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Using stable channels on NixOS is comparable to the user experience on other Linux distributions.  
Using stable channels on NixOS is comparable to the user experience on other Linux distributions.  


== Alternatives ==
== Alternatives == <!--T:13-->


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Due to the fact that Nixpkgs is ''only'' a Nix expression, it is possible to extend or replace the logic with your own sources.
Due to the fact that Nixpkgs is ''only'' a Nix expression, it is possible to extend or replace the logic with your own sources.
In fact, there are a number of extensions as well as complete replacements for Nixpkgs, see the [[Alternative Package Sets]] article.
In fact, there are a number of extensions as well as complete replacements for Nixpkgs, see the [[Alternative Package Sets]] article.
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[[Category:Pedias]]
[[Category:Pedias]]
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