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Note that we are not able to test or build unfree software on Hydra due to policy. Their configurations are managed separately.Ī user’s nixpkgs configuration is stored in a user-specific configuration file located at ~/.config/nixpkgs/config.nix. However, this does not allow unfree software for individual users. The nixpkgs configuration for a NixOS system is set in the configuration.nix, as in the following example: nix-env -qa will (attempt to) hide any packages that would be refused.Įach of these criteria can be altered in the nixpkgs configuration. In particular, all build-time dependencies are checked. Note that all this is checked during evaluation already, and the check includes any package that is evaluated. The package has known security vulnerabilities but has not or can not be updated for some reason, and a list of issues has been entered in to the package’s meta.knownVulnerabilities. The package’s meta.license is set to a license which is considered to be unfree. The package isn’t intended to run on the given system, as none of its atforms match the given system. The package is thought to be broken, and has had its meta.broken set to true. The current Nix expressions of the channels are available in the nixpkgs repository in branches that correspond to the channel names (e.g. The binaries are made available via a binary cache. The tests are conducted by a cluster called Hydra, which also builds binary packages from the Nix expressions in Nixpkgs for x86_64-linux, i686-linux and x86_64-darwin. this table shows the status of tests for the nixpkgs channel. Updates to a channel are distributed as soon as all tests for that channel pass, e.g. More up to date packages and modules are available via the nixos-unstable channel.īoth nixos-unstable and nixpkgs follow the master branch of the Nixpkgs repository, although both do lag the master branch by generally a couple of days. Stable NixOS releases are generally only given security updates. nixos-19.09, which includes all packages and modules for the stable NixOS 19.09. Users of NixOS generally use one of the nixos-* channels, e.g. The collection is distributed for users of Nix on non-NixOS distributions through the channel nixpkgs. Packages, including the Nix packages collection, are distributed through channels. With these expressions the Nix package manager can build binary packages. Also included in the collection are Nix expressions for NixOS modules.

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Nix expressions describe how to build packages from source and are collected in the nixpkgs repository.

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