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do not change existing release notes

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Valentin Gagarin 2023-08-28 20:51:44 +02:00
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13
doc/manual/src/release-notes/rl-2.12.md
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@ -2,8 +2,19 @@
* On Linux, Nix can now run builds in a user namespace where they run * On Linux, Nix can now run builds in a user namespace where they run
as root (UID 0) and have 65,536 UIDs available. as root (UID 0) and have 65,536 UIDs available.
This is primarily useful for running containers such as `systemd-nspawn`
inside a Nix build. For an example, see [`tests/systemd-nspawn/nix`][nspawn].
This can be used by requiring `uid-range` [system feature] in derivations. [nspawn]: https://github.com/NixOS/nix/blob/67bcb99700a0da1395fa063d7c6586740b304598/tests/systemd-nspawn.nix.
A build can enable this by setting the derivation attribute:
```
requiredSystemFeatures = [ "uid-range" ];
```
The `uid-range` [system feature] requires the [`auto-allocate-uids`]
setting to be enabled.
[system feature]: ../command-ref/conf-file.md#conf-system-features [system feature]: ../command-ref/conf-file.md#conf-system-features