- `gitlab` 16 deprecates the use of external container registries, in our case `pkgs.docker-distribution`. Module users who have [`services.gitlab.registry.enable`](#opt-services.gitlab.registry.enable) set to `true` are advised to back up their state and switch to gitlab's fork by setting [`services.gitlab.registry.package`](#opt-services.gitlab.registry.package) to `pkgs.gitlab-container-registry`.
- `fail2ban` has been updated to 1.0.2, which has a few breaking changes compared to 0.11.2 ([changelog for 1.0.1](https://github.com/fail2ban/fail2ban/blob/1.0.1/ChangeLog), [changelog for 1.0.2](https://github.com/fail2ban/fail2ban/blob/1.0.2/ChangeLog))
- `albert` has been updated from 0.17.6 to 0.20.13, and 0.18.0 changed the config format and many plugins ([changelog for 0.18.0](https://github.com/albertlauncher/albert/blob/v0.18.0/CHANGELOG.md))
- `dokuwiki` has been updated from 2023-07-31a (Igor) to 2023-04-04 (Jack Jackrum), which has [completely removed](https://www.dokuwiki.org/changes#release_2023-04-04_jack_jackrum) the options to embed HTML and PHP for security reasons. The [htmlok plugin](https://www.dokuwiki.org/plugin:htmlok) can be used to regain this functionality.
- The old unsupported version 6.x of the ELK-stack and Elastic beats have been removed. Use OpenSearch instead.
- The `cosmoc` package has been removed. The upstream scripts in `cosmocc` should be used instead.
- Qt 5.12 and 5.14 have been removed, as the corresponding branches have been EOL upstream for a long time. This affected under 10 packages in nixpkgs, largely unmaintained upstream as well, however, out-of-tree package expressions may need to be updated manually.
- The [services.wordpress.sites.<name>.plugins](#opt-services.wordpress.sites._name_.plugins) and [services.wordpress.sites.<name>.themes](#opt-services.wordpress.sites._name_.themes) options have been converted from sets to attribute sets to allow for consumers to specify explicit install paths via attribute name.
- `protonmail-bridge` package has been updated to major version 3.
- Nebula now runs as a system user and group created for each nebula network, using the `CAP_NET_ADMIN` ambient capability on launch rather than starting as root. Ensure that any files each Nebula instance needs to access are owned by the correct user and group, by default `nebula-${networkName}`.
- The `i18n.inputMethod.fcitx` option has been replaced with `i18n.inputMethod.fcitx5` because fcitx 4 `pkgs.fcitx` has been removed.
- In `mastodon` it is now necessary to specify location of file with `PostgreSQL` database password. In `services.mastodon.database.passwordFile` parameter default value `/var/lib/mastodon/secrets/db-password` has been changed to `null`.
- The `nix.readOnlyStore` option has been renamed to `boot.readOnlyNixStore` to clarify that it configures the NixOS boot process, not the Nix daemon.
- The latest available version of Nextcloud is v26 (available as `pkgs.nextcloud26`) which uses PHP 8.2 as interpreter by default. The installation logic is as follows:
- If `system.stateVersion` is >=23.05, `pkgs.nextcloud26` will be installed by default.
- If `system.stateVersion` is >=22.11, `pkgs.nextcloud25` will be installed by default.
- Please note that an upgrade from v24 (or older) to v26 directly is not possible. Please upgrade to `nextcloud25` (or earlier) first. Nextcloud prohibits skipping major versions while upgrading. You can upgrade by declaring [`services.nextcloud.package = pkgs.nextcloud25;`](options.html#opt-services.nextcloud.package).
- It's recommended to use the latest version available (i.e. v26) and to specify that using `services.nextcloud.package`.
- .NET 5.0 and .NET 3.1 were removed due to being end-of-life, use a newer, supported .NET version. Visit the [Support Policy](https://dotnet.microsoft.com/en-us/platform/support/policy/dotnet-core) for more information.
- The iputils package, which is installed by default, no longer provides the