Unstable stream updates: 27th December 2025
Declarative moss system-model export and import tech preview features
Moss now has the ability to use a declarative `/etc/moss/system-model.kdl` to define installed packages and repositories.
In addition, for users who prefer the classic "imperative" moss experience, it is now possible to `moss state --export` a `system-model.kdl` file of the current system to share with others.
In turn, it is also possible to one-shot `moss sync --import` an existing `system-model.kdl` file.
These features are delivered as a tech preview.
Boulder package recipe version string requirements
The Boulder packaging tool now checks for a valid recipe version string (= anything starting with an integer) and errors out if the version string is not valid.
This is necessary because our `ent` package update checking tool compares version strings to determine whether packages need an update, and will give false positives if we have a version string that looks like e.g. `v0.1.2` (note the `v`).
Highlights
- KDE Frameworks 6.21.0
- KMSCon 9.2.1 (currently not enabled by default)
- NVIDIA graphics driver 590.48.01
- discord 0.0.119
- gamescope 3.16.18
- gstreamer 1.26.10
- linux 6.17.13
- mesa 25.3.2
- sudo-rs 0.2.11
- uutils-coreutils 0.5.0
- vlc 3.22
- vscode-bin 1.107.0
- vscodium 1.107.18627
- wine 11.0-rc3
- zed 0.217.3
Other updates
Other updates include, but are not limited to:
- fastfetch
- inetutils
- inputplumber
- libdrm
- libva
- ryzenadj
- solaar
- tzdata
- wireplumber
Fixes
- Disabled LTO for the build of our recipe version checking tool `ent`, which makes `ent check updates` actually work.
- Fixed a sudo issue where using Super+T to open a cosmic-terminal in a Cosmic sesion would make sudo unable to find any commands
- Made cosmic-greeter fall back to branded background
Security Fixes:
- Patches to networkmanager and networkmanager-openvpn for CVE-2025-9615
New packages
- font-awesome-ttf 6.7.2
- lsd 1.2.0 (next gen ls command)
- swayidle 1.9.0
- yazi 25.5.31 (terminal file manager)
- yubikey-manager 5.8.0
