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2 changes: 1 addition & 1 deletion doc/manual/src/SUMMARY.md.in
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- [Experimental Features](contributing/experimental-features.md)
- [CLI guideline](contributing/cli-guideline.md)
- [C++ style guide](contributing/cxx.md)
- [Release Notes](release-notes/index.md)
- [Releases](release-notes/index.md)
{{#include ./SUMMARY-rl-next.md}}
- [Release 2.21 (2024-03-11)](release-notes/rl-2.21.md)
- [Release 2.20 (2024-01-29)](release-notes/rl-2.20.md)
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13 changes: 7 additions & 6 deletions doc/manual/src/release-notes/index.md
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# Nix Release Notes

The Nix release cycle is calendar-based as follows:

Nix has a release cycle of roughly 6 weeks.
Notable changes and additions are announced in the release notes for each version.

Bugfixes can be backported on request to previous Nix releases.
We typically backport only as far back as the Nix version used in the latest NixOS release, which is announced in the [NixOS release notes](https://nixos.org/manual/nixos/stable/release-notes.html#ch-release-notes).

Backports never skip releases.
If a feature is backported to version `x.y`, it must also be available in version `x.(y+1)`.
This ensures that upgrading from an older version with backports is still safe and no backported functionality will go missing.
The supported Nix versions are:
- The latest release
- The version used in the stable NixOS release, which is announced in the [NixOS release notes](https://nixos.org/manual/nixos/stable/release-notes.html#ch-release-notes).

Bugfixes and security issues are backported to every supported version.
Patch releases are published as needed.