NixOS 25.05Warbler
NixOS 25.05 was released on May 23, 2025 and reached end of life on Dec 31, 2025. It no longer receives security updates.
NixOS 25.05 support timeline
May 23, 2025Ended
100% elapsedEnd of life
Dec 31, 2025
NixOS 25.05 release and support dates
| Milestone | Date | Meaning |
|---|---|---|
| Released | ||
| End of life | Security updates stop. endoflife.date’s listed end of support. |
Source: endoflife.date, fetched Oct 6, 2026. Status as of Oct 7, 2026. Support scope varies by project; confirm on the official site.
What to do now that NixOS 25.05 is end of life
Running an end-of-life release means new vulnerabilities in the kernel, browser libraries, and system packages stay unpatched. The next supported step is NixOS 26.05, supported until Dec 31, 2026.
Switch the nixos channel (or your flake’s nixpkgs input) to the new release, then run sudo nixos-rebuild switch --upgrade.
Other NixOS versions
| Version | Released | End of life |
|---|---|---|
| NixOS 26.05 Yarara | May 30, 2026 | Dec 31, 2026 |
| NixOS 25.11 Xantusia | Nov 30, 2025 | Jun 30, 2026 |
| NixOS 25.05 Warbler | May 23, 2025 | Dec 31, 2025 |
| NixOS 24.11 Vicuña | Nov 30, 2024 | Jun 30, 2025 |
| NixOS 24.05 Uakari | May 31, 2024 | Dec 31, 2024 |
| NixOS 23.11 Tapir | Nov 29, 2023 | Jun 30, 2024 |
| NixOS 23.05 Stoat | May 31, 2023 | Dec 31, 2023 |
NixOS 25.05: common questions
When does NixOS 25.05 reach end of life?
NixOS 25.05 reached end of life on Dec 31, 2025, according to endoflife.date.
Is NixOS 25.05 still supported?
No. NixOS 25.05 has reached end of life and no longer receives security updates. Upgrade to NixOS 26.05 to stay supported.
When was NixOS 25.05 released?
NixOS 25.05 was released on May 23, 2025.
What is the codename of NixOS 25.05?
NixOS 25.05 is codenamed “Warbler”.
What should I upgrade NixOS 25.05 to?
NixOS 26.05 is the next release that is still supported (until Dec 31, 2026).