- KDE Plasma has been upgraded from v5.24 to v5.26. Please see the release notes for [v5.25](https://kde.org/announcements/plasma/5/5.25.0/) and [v5.26](https://kde.org/announcements/plasma/5/5.26.0/) for more details on the included changes.

- Cinnamon has been updated to 5.4, and the Cinnamon module now defaults to
  Blueman as the Bluetooth manager and slick-greeter as the LightDM greeter, to match upstream.

- PHP now defaults to PHP 8.1, updated from 8.0.

- Perl has been updated to 5.36, and its core module `HTTP::Tiny` was patched to verify SSL/TLS certificates by default.

- Python now defaults to 3.10, updated from 3.9.

## Backward Incompatibilities {#sec-release-22.11-incompatibilities}

- Nixpkgs now requires Nix 2.3 or newer.

- The `isCompatible` predicate checking CPU compatibility is no longer exposed
  by the platform sets generated using `lib.systems.elaborate`. In most cases
  you will want to use the new `canExecute` predicate instead which also
  takes the kernel / syscall interface into account.
  `lib.systems.parse.isCompatible` still exists, but has changed semantically:
  Architectures with differing endianness modes are *no longer considered compatible*.

- `ngrok` has been upgraded from 2.3.40 to 3.0.4. Please see [the upgrade guide](https://ngrok.com/docs/guides/upgrade-v2-v3)
  and [changelog](https://ngrok.com/docs/ngrok-agent/changelog). Notably, breaking changes are that the config file format has
  changed and support for single hyphen arguments was dropped.

- `i18n.supportedLocales` is now only generated with the locales set in `i18n.defaultLocale` and `i18n.extraLocaleSettings`.
  - This reduces the final system closure size by up to 200MB.
  - If you require all locales installed, set the option to ``[ "all" ]``.

- Deprecated settings `logrotate.paths` and `logrotate.extraConfig` have
  been removed. Please convert any uses to
  [services.logrotate.settings](#opt-services.logrotate.settings) instead.

- The `isPowerPC` predicate, found on `platform` attrsets (`hostPlatform`, `buildPlatform`, `targetPlatform`, etc) has been removed in order to reduce confusion.  The predicate was was defined such that it matches only the 32-bit big-endian members of the POWER/PowerPC family, despite having a name which would imply a broader set of systems.  If you were using this predicate, you can replace `foo.isPowerPC` with `(with foo; isPower && is32bit && isBigEndian)`.

- The `fetchgit` fetcher now uses [cone mode](https://www.git-scm.com/docs/git-sparse-checkout/2.37.0#_internalscone_mode_handling) by default for sparse checkouts. [Non-cone mode](https://www.git-scm.com/docs/git-sparse-checkout/2.37.0#_internalsnon_cone_problems) can be enabled by passing `nonConeMode = true`, but note that non-cone mode is deprecated and this option may be removed alongside a future Git update without notice.

- The `fetchgit` fetcher supports sparse checkouts via the `sparseCheckout` option. This used to accept a multi-line string with directories/patterns to check out, but now requires a list of strings.

- `openssh` was updated to version 9.1, disabling the generation of DSA keys when using `ssh-keygen -A` as they are insecure. Also, `SetEnv` directives in `ssh_config` and `sshd_config` are now first-match-wins.

- `bsp-layout` no longer uses the command `cycle` to switch to other window layouts, as it got replaced by the commands `previous` and `next`.

- The Barco ClickShare driver/client package `pkgs.clickshare-csc1` and the option `programs.clickshare-csc1.enable` have been removed,
  as it requires `qt4`, which reached its end-of-life 2015 and will no longer be supported by nixpkgs.
  [According to Barco](https://www.barco.com/de/support/knowledge-base/4380-can-i-use-linux-os-with-clickshare-base-units) many of their base unit models can be used with Google Chrome and the Google Cast extension.

- `services.hbase` has been renamed to `services.hbase-standalone`.
  For production HBase clusters, use `services.hadoop.hbase` instead.