120f24202b
Previously, we would set GHC_PACKAGE_PATH after configure, the reasons being that 1. Setup.hs configure forbids this from being set since it can make a build fail that would otherwise succeed (since it influences how GHC behaves when invoked by Cabal). 2. Setting GHC_PACKAGE_PATH being set is sound in our case, since we set it precisely to the packages available to Cabal at configure time, so there should be no room for a mismatch. 3. Some test suites require GHC_PACKAGE_PATH or GHC_ENVIRONMENT to be set, so they can invoke GHC(i) with build dependencies available. Cabal >= 3.12 forbids GHC_PACKAGE_PATH from being set after <https://github.com/haskell/cabal/commit/d6e38041a7c778fadf8f416>. Setting GHC_ENVIRONMENT would be possible, but is cumbersome without cabal-install (which has the handy cabal exec command which takes care of that). Additionally, it is not clear if it'll remain possible to do that: <https://github.com/haskell/cabal/issues/7792>. Our solution to Cabal 3.12's change is to be more targeted about setting GHC_PACKAGE_PATH: We _just_ set it for the actual test suite executable. This can be achieved by using --test-wrapper which when given is invoked by Cabal to run the test suite. Here we can set any environment variables after Cabal has already done its environment checks. As long as we don't do anything stupid, this should be unproblematic. Users can also arbitrarily influence what GHC_PACKAGE_PATH will contain using the NIX_GHC_PACKAGE_PATH_FOR_TEST environment variable. This is un(der)documented for now, since I want to keep some wiggle room for changing stuff in the coming weeks. Also it's rarely necessary to actually touch this variable. |
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| .github | ||
| doc | ||
| lib | ||
| maintainers | ||
| nixos | ||
| pkgs | ||
| .editorconfig | ||
| .git-blame-ignore-revs | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .version | ||
| CONTRIBUTING.md | ||
| COPYING | ||
| default.nix | ||
| flake.nix | ||
| README.md | ||
Nixpkgs is a collection of over 100,000 software packages that can be installed with the Nix package manager. It also implements NixOS, a purely-functional Linux distribution.
Manuals
- NixOS Manual - how to install, configure, and maintain a purely-functional Linux distribution
- Nixpkgs Manual - contributing to Nixpkgs and using programming-language-specific Nix expressions
- Nix Package Manager Manual - how to write Nix expressions (programs), and how to use Nix command line tools
Community
- Discourse Forum
- Matrix Chat
- NixOS Weekly
- Official wiki
- Community-maintained list of ways to get in touch (Discord, Telegram, IRC, etc.)
Other Project Repositories
The sources of all official Nix-related projects are in the NixOS organization on GitHub. Here are some of the main ones:
- Nix - the purely functional package manager
- NixOps - the tool to remotely deploy NixOS machines
- nixos-hardware - NixOS profiles to optimize settings for different hardware
- Nix RFCs - the formal process for making substantial changes to the community
- NixOS homepage - the NixOS.org website
- hydra - our continuous integration system
- NixOS Artwork - NixOS artwork
Continuous Integration and Distribution
Nixpkgs and NixOS are built and tested by our continuous integration system, Hydra.
- Continuous package builds for unstable/master
- Continuous package builds for the NixOS 23.11 release
- Tests for unstable/master
- Tests for the NixOS 23.11 release
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.
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 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.
Donations
The infrastructure for NixOS and related projects is maintained by a nonprofit organization, the NixOS Foundation. 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 or by using Open Collective:
License
Nixpkgs is licensed under the MIT License.
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.