Bernardo Meurer Costa
7a399bb746
Cargo's `[lints]` table is a cargo-only feature: cargo translates the
entries into `-A`/`-W`/`-D`/`-F` rustc flags before invoking the
compiler. Since buildRustCrate calls rustc directly, these lints were
silently ignored, forcing users to duplicate them as raw flags in
`extraRustcOpts`.
Accept a `lints` attr with the same shape as the Cargo.toml section
(tool → lint name → level string or `{ level, priority }` attrset),
translate it to rustc flags in Nix, and append to the rustc command
line. Entries are sorted by ascending priority so lower-priority lint
groups are emitted first and can be overridden by more specific lints,
matching cargo's behaviour.
The `capLints` default changes from `"allow"` to `null`, resolved to
`"allow"` when `lints` is empty (the usual case for third-party
dependencies) and `"forbid"` when `lints` is set — otherwise a
`deny`/`forbid` lint would be silently capped and the table would be a
no-op. Explicit `capLints` still overrides. This is the same model
cargo uses: your own crate's `[lints]` always apply; only
dependencies get `--cap-lints allow`.
Generators like crate2nix can populate `lints` directly from the
manifest at generation time.
Nixpkgs is a collection of over 120,000 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
- 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 Branding - NixOS branding
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 25.11 release
- Tests for unstable/master
- Tests for the NixOS 25.11 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 like a lot at first, it helps to 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.