NixOS 24.05: Desktop Environment Upgrades and New Service Additions

- Lomiri (formerly known as Unity8) desktop mode, using Mir 2.x to function as a Wayland compositor, is now available and can be installed with `services.desktopManager.lomiri.enable = true`. Note that some core applications, services and indicators have yet to be packaged, and some functions may remain incomplete, but the base experience should be there. - LXQt has been updated to 2.0, which is based on Qt 6 and features Wayland support for many applications. - MATE has been updated to 1.28. - To properly support panel plugins built with Wayland (in-process) support, we are introducing the `services.xserver.desktopManager.mate.extraPanelApplets` option, please use that for installing panel applets. - Similarly, please use the `services.xserver.desktopManager.mate.extraCajaExtensions` option for installing Caja extensions. - To use the Wayland session, enable `services.xserver.desktopManager.mate.enableWaylandSession`. This is opt-in for now as it is in early an stage and introduces a new set of Wayfire closures. Due to [known issues with LightDM](https://github.com/canonical/lightdm/issues/63), we suggest using SDDM as the display manager. - Plasma 6 is now available and can be installed with `services.desktopManager.plasma6.enable = true;`. Plasma 5 will likely be deprecated in the next release (24.11). Note that Plasma 6 runs as Wayland by default, and the X11 session needs to be explicitly selected if necessary. ## New Services {#sec-release-24.05-new-services}  - [Anki Sync Server](https://docs.ankiweb.net/sync-server.html), the official sync server built into recent versions of Anki. Available as [services.anki-sync-server](#opt-services.anki-sync-server.enable). The pre-existing `services.ankisyncd` has been marked deprecated and will be dropped after 24.05 due to lack of maintenance of the ankisyncd software. - [ALVR](https://github.com/alvr-org/alvr), a VR desktop streamer. Available as [programs.alvr](#opt-programs.alvr.enable). - [AppImage](https://appimage.org/), a tool to package desktop applications, now has a `binfmt` option to support running AppImages seamlessly on NixOS. Available as [programs.appimage.binfmt](#opt-programs.appimage.binfmt). - [armagetronad](https://wiki.armagetronad.org), a mid-2000s 3D lightcycle game widely played at iD Tech Camps. You can define multiple servers using `services.armagetronad.<server>.enable`. - [BenchExec](https://github.com/sosy-lab/benchexec), a framework for reliable benchmarking and resource measurement, available as [programs.benchexec](#opt-programs.benchexec.enable), as well as related programs [CPU Energy Meter](https://github.com/sosy-lab/cpu-energy-meter), available as [programs.cpu-energy-meter](#opt-programs.cpu-energy-meter.enable), and [PQoS Wrapper](https://gitlab.com/sosy-lab/software/pqos-wrapper), available as [programs.pqos-wrapper](#opt-programs.pqos-wrapper.enable). - [Bluemap](https://bluemap.bluecolored.de/), a 3D minecraft map renderer. Available as [services.bluemap](#opt-services.bluemap.enable). - [clatd](https://github.com/toreanderson/clatd), a CLAT / SIIT-DC Edge Relay implementation for Linux. - [Clevis](https://github.com/latchset/clevis), a pluggable framework for automated decryption, used to unlock encrypted devices in initrd. Available as [boot.initrd.clevis.enable](#opt-boot.initrd.clevis.enable). - [CommaFeed](https://github.com/Athou/commafeed), a Google Reader-inspired self-hosted RSS reader. Available as [services.commafeed](#opt-services.commafeed.enable). - [davis](https://github.com/tchapi/davis), a simple CardDav and CalDav server inspired by Baïkal. Available as [services.davis](#opt-services.davis.enable). - [db-rest](https://github.com/derhuerst/db-rest), a wrapper around Deutsche Bahn's internal API for public transport data. Available as [services.db-rest](#opt-services.db-rest.enable). - [dnsproxy](https://github.com/AdguardTeam/dnsproxy), a simple DNS proxy with DoH, DoT, DoQ and DNSCrypt support. Available as [services.dnsproxy](#opt-services.dnsproxy.enable).

NixOS 24.05 updates desktop environments and introduces new services. Lomiri (Unity8) desktop mode is now available with Mir 2.x Wayland support, though some features are incomplete. LXQt 2.0 is updated, based on Qt 6, with Wayland support. MATE 1.28 includes new options for panel applets and Caja extensions, plus an opt-in Wayland session (SDDM recommended). Plasma 6 is now available, defaulting to Wayland, and Plasma 5 will be deprecated. New services added encompass Anki Sync Server (replacing `ankisyncd`), ALVR (VR streamer), AppImage `binfmt` support, Armagetronad servers, benchmarking tools (BenchExec, CPU Energy Meter, PQoS Wrapper), Bluemap (3D Minecraft renderer), clatd, Clevis (initrd decryption), CommaFeed (RSS), Davis (CardDav/CalDav), db-rest (Deutsche Bahn API), and dnsproxy.