···14141515- The default [Nix](https://github.com/NixOS/nix) version was updated from 2.11 to 2.13. In particular, this includes a [small language alteration](https://github.com/NixOS/nix/issues/8259) in the way floats are represented in `builtins.toJSON`. See the release notes for [2.13](https://nixos.org/manual/nix/stable/release-notes/rl-2.13.html) and [2.14](https://nixos.org/manual/nix/unstable/release-notes/rl-2.14.html) for more information.
16161717-- The default [Linux Kernel](https://kernel.org/) was updated from version 5.15 to 6.1, see [Kernelnewbies](https://kernelnewbies.org/Linux_6.1) for what has changed. All currently shown Kernels shown on [kernel.org](https://kernel.org/) are available.
1717+- The default [Linux Kernel](https://kernel.org/) was updated from version 5.15 to 6.1, see [Kernelnewbies](https://kernelnewbies.org/Linux_6.1) for what has changed. All Kernels currently shown on [kernel.org](https://kernel.org/) are available.
18181919- [systemd](https://systemd.io) has been updated from v252 to v253, see [the release notes](https://github.com/systemd/systemd/blob/main/NEWS#L21-L677) for more information on the changes.
2020 - Updating with `nixos-rebuild boot` and rebooting is recommended, since in some rare cases the `nixos-rebuild switch` into the new generation on a live system might fail due to missing mount units.
···199199- `git-bug` has been updated to at least version 0.8.0, which includes backwards incompatible changes. The `git-bug-migration` package can be used to upgrade existing repositories.
200200201201- `graylog` has been updated to version 5, which can not be updated directly from the previously packaged version 3.3. If you had installed the previously packaged version 3.3, please follow the [upgrade path](https://go2docs.graylog.org/5-0/upgrading_graylog/upgrade_path.htm) from 3.3 to 4.0 to 4.3 to 5.0.
202202-203203-- `buildFHSUserEnv` is now called `buildFHSEnv` and uses FlatPak's Bubblewrap sandboxing tool rather than Nixpkgs' own chrootenv. The old chrootenv-based implemenation is still available via `buildFHSEnvChrootenv` but is considered deprecated and will be removed when the remaining uses inside Nixpkgs have been migrated. If your FHSEnv-wrapped application misbehaves when using the new bubblewrap implementation, please create an issue in Nixpkgs.
204204-205202206203- `buildFHSUserEnv` is now called `buildFHSEnv` and uses FlatPak's Bubblewrap sandboxing tool rather than Nixpkgs' own chrootenv. The old chrootenv-based implemenation is still available via `buildFHSEnvChrootenv` but is considered deprecated and will be removed when the remaining uses inside Nixpkgs have been migrated. If your FHSEnv-wrapped application misbehaves when using the new bubblewrap implementation, please create an issue in Nixpkgs.
207204···548545- The option `services.jitsi-videobridge.apis` has been renamed to `colibriRestApi` and turned into a boolean. Setting it to `true` will enable the private rest API, useful for monitoring using `services.prometheus.exporters.jitsi.enable`. Learn more about the API: "[The COLIBRI control interface (/colibri/)](https://github.com/jitsi/jitsi-videobridge/blob/v2.3/doc/rest.md)".
549546550547- Booting from a volume managed by the Stratis storage management daemon is now supported. Use `fileSystems.<name>.stratis.poolUuid` to configure the pool containing the fs.
551551-552552-- Only `k3s` version 1.26 is included. Users of the `k3s_1_24` or `k3s_1_25` packages should upgrade to use the version 1.26 of the package.
553548554549## Nixpkgs internals {#sec-release-23.05-nixpkgs-internals}
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