CachyOS just shipped its fourth release of the year, on June 28, 2026. This update brings concrete improvements across three areas: the desktop environment, system performance, and network security. Here’s what you need to know before upgrading.
CachyOS June 2026: the highlights
This release isn’t a major breaking change, but it solidifies several of the distribution’s strengths. The project keeps a steady release cadence and clearly targets advanced users who want an Arch-based Linux built for performance.
The update command stays the same for existing users:
sudo pacman -Syu
No manual changes required.
Hyprland Noctalia: a new Wayland desktop in the installer
The most visible addition is the Hyprland Noctalia desktop. It’s now available directly in the installer, complete with an integrated preview video. The idea is straightforward: let users see the environment before they commit to it.
Hyprland is a tiling Wayland compositor with a growing community. By adding it as an official option, CachyOS expands its offering beyond KDE and GNOME without bloating the installer.
Other installer changes: MangoWM switches to SDDM as its display manager, and GNOME System Monitor is replaced by Resources. The paru package is no longer installed by default, replaced by Shelly, available in both GUI and CLI modes.
Python performance and GCC fixes
CachyOS continues pushing its low-level optimization work. Python now benefits from extended PGO (Profile-Guided Optimization). PGO works by compiling the binary once, running it against real workloads, then recompiling using the profiling data. The result is a binary better tuned to common execution patterns.
A GCC patch is also included to refine branch prediction on generic x86. It helps GCC better estimate the cost of branch mispredictions on modern Intel and AMD CPUs. This kind of fix is typically invisible to end users but can make a real difference on intensive workloads.
A notable fix involves OpenBLAS: a regression spotted in Phoronix benchmarks on high-core-count CPUs is addressed in this release.
DNS-over-QUIC and Pacman network isolation
On the security front, two additions are worth highlighting.
First: CachyOS-Welcome now includes DNS-over-QUIC (DoQ) support via blocky, with support for custom endpoints. DNS-over-QUIC is still rare in mainstream distributions. It combines the encryption of DNS-over-TLS with the lower latency of QUIC, which is relevant for users who care about network privacy.
Second: Pacman gets network isolation for its scriptlets and hooks. In practice, scripts running during package installation or upgrades can no longer access the network by default. It’s a simple but effective security measure to reduce the attack surface during installations.
Multi-GPU fixes and system stability
Multi-GPU setups have long been a source of driver conflicts on Linux. chwd, CachyOS’s hardware detection tool, now resolves conflicts on systems with GPUs that require incompatible driver branches (for example, multiple generations of NVIDIA GPUs). It installs the best common driver or falls back to the primary GPU.
Additional stability fixes are included:
- User service timeouts are now set to 15 seconds at startup and 10 seconds at shutdown, eliminating the 90-second delays on system shutdown.
- The installer fixes keyboard layout order handling and locale configuration.
- Copying the pacman configuration into the installed system is now fixed.
- Leftover
/etc/calamaresdirectories are cleaned up after installation. - CachyOS-Welcome no longer crashes when
cachyos-piis not installed. - A crash when reading the saved settings file is fixed, with a clean reset to default values.
On the localization side, Italian, German, French, Japanese, and Bulgarian translations are updated. New languages are added: Azerbaijani, Greek, and Turkish (in chwd). French README and involvement pages are also added.
Key takeaways
- Hyprland Noctalia is the most visible new feature: a tiling Wayland desktop now integrated in the installer with a preview.
- Extended PGO for Python and the GCC branch prediction patch target users with compute-heavy or compilation-intensive workloads.
- DNS-over-QUIC via blocky and Pacman network isolation improve the distribution’s security posture without any manual setup.
- Multi-GPU fixes and service timeouts improve stability on heterogeneous hardware.
- The update is non-destructive for existing users: a simple
sudo pacman -Syuis all it takes.
If you’re running performance-first Linux environments or network security is a priority, this release is worth the upgrade. For verified performance numbers, Phoronix benchmarks remain the independent reference to check.
Questions about integrating CachyOS into a DevOps pipeline or hardening a Linux workstation? Feel free to share in the comments or follow the blog for future write-ups.
Sources
- Official CachyOS June 2026 Release announcement (cachyos.org, June 28, 2026)
- Official CachyOS forum (discuss.cachyos.org, June 28, 2026)