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This option requests compatibility with older NixOS releases with respect to stateful data, in cases where new releases have defaults that might be incompatible with system state of existing NixOS deployments. For instance, if we change the default version of PostgreSQL, existing deployments will break if the new version can't read databases created by the old version. So for example, setting system.stateVersion = "15.07"; requests that options like services.postgresql.package use defaults corresponding to the 15.07 release branch. Note that nixos-generate-config emits this option. (In the future, NixOps may set system.stateVersion to the NixOS release in use when the machine was created.) See also #7939 for another motivating example. |
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doc | ||
lib | ||
maintainers | ||
nixos | ||
pkgs | ||
.gitignore | ||
.travis.yml | ||
.version | ||
CONTRIBUTING.md | ||
COPYING | ||
default.nix | ||
README.md |
Nixpkgs is a collection of packages for the Nix package manager. It is periodically built and tested by the hydra build daemon as so-called channels. To get channel information via git, add nixpkgs-channels as a remote:
% git remote add channels git://github.com/NixOS/nixpkgs-channels.git
For stability and maximum binary package support, it is recommended to maintain
custom changes on top of one of the channels, e.g. nixos-14.12
for the latest
release and nixos-unstable
for the latest successful build of master:
% git remote update channels
% git rebase channels/nixos-14.12
For pull-requests, please rebase onto nixpkgs master
.
NixOS linux distribution source code is located inside
nixos/
folder.
- NixOS installation instructions
- Documentation (Nix Expression Language chapter)
- Manual (How to write packages for Nix)
- Manual (NixOS)
- Continuous package builds for unstable/master
- Continuous package builds for 14.12 release
- Tests for unstable/master
- Tests for 14.12 release
Communication: