New Service Additions and Backward Incompatibilities

- [angrr](https://github.com/linyinfeng/angrr), a service that automatically cleans up old auto GC roots. Available as [services.angrr](#opt-services.angrr.enable). - [Sharkey](https://joinsharkey.org), a Sharkish microblogging platform. Available as [services.sharkey](#opt-services.sharkey.enable). - [fw-fanctrl](https://github.com/TamtamHero/fw-fanctrl), a simple systemd service to better control Framework Laptop's fan(s). Available as [hardware.fw-fanctrl](#opt-hardware.fw-fanctrl.enable). - [SillyTavern](https://sillytavern.app/), LLM Frontend for Power Users. Available as [services.sillytavern](#opt-services.sillytavern.enable). - [mautrix-discord](https://github.com/mautrix/discord), a Matrix-Discord puppeting/relay bridge. Available as [services.mautrix-discord](#opt-services.mautrix-discord.enable). - [Timekpr-nExT](https://mjasnik.gitlab.io/timekpr-next/), a time managing application that helps optimizing time spent at computer for your subordinates, children or even for yourself. Available as [](#opt-services.timekpr.enable). - [SuiteNumérique Meet](https://github.com/suitenumerique/meet) is an open source alternative to Google Meet and Zoom powered by LiveKit: HD video calls, screen sharing, and chat features. Built with Django and React. Available as [services.lasuite-meet](#opt-services.lasuite-meet.enable). - [lemurs](https://github.com/coastalwhite/lemurs), a customizable TUI display/login manager. Available at [services.displayManager.lemurs](#opt-services.displayManager.lemurs.enable). - [paisa](https://github.com/ananthakumaran/paisa), a personal finance tracker and dashboard. Available as [services.paisa](#opt-services.paisa.enable). - [conman](https://github.com/dun/conman), a serial console management program. Available as [services.conman](#opt-services.conman.enable). - [KMinion](https://github.com/redpanda-data/kminion), feature-rich Prometheus exporter for Apache Kafka. Available as [services.prometheus.exporters.kafka](options.html#opt-services.prometheus.exporters.kafka). - [Spoolman](https://github.com/Donkie/Spoolman), a inventory management system for Filament spools. Available as [services.spoolman](#opt-services.spoolman.enable). - [Temporal](https://temporal.io/), a durable execution platform that enables developers to build scalable applications without sacrificing productivity or reliability. Available as [services.temporal](#opt-services.temporal.enable). - `services.libvirtd.autoSnapshot`, a backup service for libvirt managed vms. - [Sshwifty](https://github.com/nirui/sshwifty), a Telnet and SSH client for your browser. Available as [services.sshwifty](#opt-services.sshwifty.enable). ## Backward Incompatibilities {#sec-release-25.11-incompatibilities}  - The Perl implementation of the `switch-to-configuration` program is removed. All switchable systems now use the Rust rewrite. Any prior usage of `system.switch.enableNg` must now be removed. If you have any outstanding issues with the new implementation, please open an issue on GitHub. - The `no-broken-symlink` build hook now also fails builds whose output derivation contains links to $TMPDIR (typically /build, which contains the build directory). - The `services.polipo` module has been removed as `polipo` is unmaintained and archived upstream. - `virtualisation.lxd` has been removed due to lack of Nixpkgs maintenance. Users can migrate to `virtualisation.incus`, a fork of LXD, as a replacement. See [Incus migration documentation](https://linuxcontainers.org/incus/docs/main/howto/server_migrate_lxd/) for migration information. - The non-LTS Forgejo package (`forgejo`) has been updated to 12.0.0. This release contains breaking changes, see the [release blog post](https://forgejo.org/2025-07-release-v12-0/) for all the details and how to ensure smooth upgrades. - `sing-box` has been updated to 1.12.3, which includes a number of breaking changes, old configurations may need updating or they will cause the tool to fail to run.

This chunk details a range of new software and service integrations, including angrr (GC root cleanup), Sharkey (microblogging), fw-fanctrl (Framework fan control), SillyTavern (LLM frontend), mautrix-discord (Matrix-Discord bridge), Timekpr-nExT (time management), SuiteNumérique Meet (video conferencing), lemurs (TUI display manager), paisa (personal finance), conman (serial console management), KMinion (Kafka exporter), Spoolman (filament inventory), Temporal (durable execution platform), libvirtd.autoSnapshot (VM backup), and Sshwifty (browser Telnet/SSH client). It also outlines several backward incompatibilities: the Perl `switch-to-configuration` program is removed (now Rust-based), the `no-broken-symlink` build hook now fails on `$TMPDIR` links, `services.polipo` and `virtualisation.lxd` modules are removed (with Incus suggested as an LXD replacement), and updates to Forgejo (v12.0.0) and sing-box (v1.12.3) introduce breaking changes requiring configuration adjustments.