NixOS 25.05 End of Life
Support dates and upgrade guidance — rebuilt from live data.
NixOS 25.05 reached end of life on 31 Dec 2025. It no longer receives security fixes.
Support timeline
Official dates from the NixOS release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 23 May 2025 | — |
| End of life | 31 Dec 2025 | 0.6 years ago |
| Latest release | — | final |
Where to go from 25.05
Recommended target: NixOS 26.05 (supported until 31 Dec 2026).
The newest actively supported branch is NixOS 26.05 (latest release ).
Frequently asked questions
Is NixOS 25.05 still safe to use?
NixOS 25.05 reached end of life on 31 Dec 2025, 221 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download NixOS 25.05?
Yes — the final release (25.05) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade NixOS 25.05 to?
Upgrade to NixOS 26.05, the newest actively supported branch (supported until 31 Dec 2026).