The independent Linux distribution NixOS has launched version 25.05, codenamed Warbler, which marks a significant update six months after the previous release. This version integrates long-term support (LTS) provided by the Linux kernel 6.12, alongside the more recent kernel 6.14. Notable among its features is support for the latest GNOME 48 desktop environment and initial compatibility with System76’s Rust-based COSMIC desktop environment.
Developers highlighted that users can enable COSMIC by configuring the services.displayManager.cosmic-greeter and services.desktopManager.cosmic options. While stable, this integration is still considered experimental due to its newness.
Additionally, NixOS 25.05 introduces a new command, nixos-rebuild build-image, allowing for tailored disk image creation from user configurations. A complete rewrite of the nixos-rebuild tool in Python, named nixos-rebuild-ng, is another key update. The nixos-option package also underwent significant rewriting, now utilizing a Nix expression accessible via a simple Bash script, and support was added for the Lockable HTTP Tarball protocol.
This release includes substantial updates to core components, such as OpenSSH 10.0p2, LLVM 19, and GCC 14. Moreover, the hosting of rootless containers using “podman” is now supported under virtualisation.containers, and both Xfce 4.20 and Cinnamon 6.4 desktops have been updated.
For those looking to download NixOS 25.05, it is available as a graphical ISO pre-installed with both the GNOME and KDE Plasma environments, as well as a Minimal ISO flavor. Users can visit the official NixOS release announcement for further details.
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