- `cassandra_2_1` and `cassandra_2_2` have been removed. Please update to `cassandra_3_11` or `cassandra_3_0`. See the [changelog](https://github.com/apache/cassandra/blob/cassandra-3.11.14/NEWS.txt) for more information about the upgrade process.

- `mysql57` has been removed. Please update to `mysql80` or `mariadb`. See the [upgrade guide](https://mariadb.com/kb/en/upgrading-from-mysql-to-mariadb/) for more information.

- Consequently, `cqrlog` and `amorok` now use `mariadb` instead of `mysql57` for their embedded databases. Running `mysql_upgrade` may be necessary.
- `k3s` supports `clusterInit` option, and it is enabled by default, for servers.

- `percona-server56` has been removed. Please migrate to `mysql` or `mariadb` if possible.

- `obs-studio` hase been updated to version 28. If you have packaged custom plugins, check if they are compatible. `obs-websocket` has been integrated into `obs-studio`.

- `signald` has been bumped to `0.23.0`. For the upgrade, a migration process is necessary. It can be
  done by running a command like this before starting `signald.service`:

  ```
  signald -d /var/lib/signald/db \
    --database sqlite:/var/lib/signald/db \
    --migrate-data
  ```

  For further information, please read the upstream changelogs.

- `stylua` no longer accepts `lua52Support` and `luauSupport` overrides. Use `features` instead, which defaults to `[ "lua54" "luau" ]`.

- `ocamlPackages.ocaml_extlib` has been renamed to `ocamlPackages.extlib`.

- `pkgs.fetchNextcloudApp` has been rewritten to circumvent impurities in e.g. tarballs from GitHub and to make it easier to
  apply patches. This means that your hashes are out-of-date and the (previously required) attributes `name` and `version`
  are no longer accepted.

- The Syncthing service now only allows absolute paths---starting with `/` or
  `~/`---for `services.syncthing.folders.<name>.path`.
  In a future release other paths will be allowed again and interpreted
  relative to `services.syncthing.dataDir`.

- `services.github-runner` and `services.github-runners.<name>` gained the option `serviceOverrides` which allows overriding the systemd `serviceConfig`. If you have been overriding the systemd service configuration (i.e., by defining `systemd.services.github-runner.serviceConfig`), you have to use the `serviceOverrides` option now. Example:

  ```nix
  {
    services.github-runner.serviceOverrides.SupplementaryGroups = [
      "docker"
    ];
  }
  ```

<!-- To avoid merge conflicts, consider adding your item at an arbitrary place in the list instead. -->

## Other Notable Changes {#sec-release-22.11-notable-changes}

- PHP is now built in `NTS` (Non-Thread Safe) mode by default.
  - For Apache and `mod_php` usage, we enable `ZTS` (Zend Thread Safe) mode. This has been a
  common practice for a long time in other distributions.

- `firefox`, `thunderbird` and `librewolf` now come with Wayland support by default. The `firefox-wayland`, `firefox-esr-wayland`, `thunderbird-wayland` and `librewolf-wayland` attributes are obsolete and have been aliased to their generic attribute.

- The `xplr` package has been updated from 0.18.0 to 0.19.0, which brings some breaking changes. See the [upstream release notes](https://github.com/sayanarijit/xplr/releases/tag/v0.19.0) for more details.

- Configuring multiple GitHub runners is now possible through `services.github-runners.<name>`. The options under `services.github-runner` remain, to configure a single runner.

- `github-runner` gained support for ephemeral runners and registrations using a personal access token (PAT) instead of a registration token. See `services.github-runner.ephemeral` and `services.github-runner.tokenFile` for details.

- A new module was added to provide hardware support for the Saleae Logic device family, providing the options `hardware.saleae-logic.enable` and `hardware.saleae-logic.package`.

- ZFS module will no longer allow hibernation by default.
  - This is a safety measure to prevent data loss cases like the ones described at [OpenZFS/260](https://github.com/openzfs/zfs/issues/260) and [OpenZFS/12842](https://github.com/openzfs/zfs/issues/12842).