AerynOS has published its October 2025 development update, confirming the release of its 2025.10 GNOME Live ISO. The Linux distribution’s developers made a major switch this month, moving from clang’s libc++ to GNU’s libstdc++ across the repository. That decision required hundreds of rebuilds but helped fix long-standing issues, including one that affected Firefox’s Widevine DRM and caused certain video conferencing tools to crash.
Alongside the compiler transition, the team continued refining both moss (AerynOS’s package and system manager) and boulder (its build infrastructure). The moss state verify command now runs tasks in parallel using rayon, cutting verification times substantially, though a progress bar is still on the roadmap. A persistent infrastructure bug that caused random build hangs was also finally squashed, thanks to developer Cory Forsstrom’s work simplifying thread management and namespace isolation.
The new ISO includes updated desktop stacks like GNOME 49.1, KDE Plasma 6.5.1, and Cosmic Beta3. KDE has now been promoted as a recommended install option alongside GNOME. The Cosmic environment has seen more testers and faster update cycles, tracking close to System76’s upstream development. Users of Cosmic Terminal and GNOME Ptyxis may still encounter sudo-rs issues, though workarounds exist using other terminal emulators.
AerynOS also previewed an early prototype of its moss system-model feature, which aims to let users define and switch between system states declaratively, similar to features seen in Conary, Gentoo, and FreeBSD. This opt-in capability will eventually support both live systems and installations, giving advanced users and system integrators more flexibility.
For those wanting to try it out, the refreshed AerynOS 2025.10 GNOME Live ISO is now available for download from the project’s official site.
