NixOS end of life: end of support by version
NixOS Foundation · Operating Systems
For NixOS by NixOS Foundation, patchletter knows 12 support cycles. 11 of them have already ended and receive no more security updates. The next support window closes on 31/12/2026, that is in 126 days. The current version of NixOS is 26.05. The cycles come from the open endoflife.date project, last reconciled on 26/08/2026.
When does support end for which NixOS version?
A cycle is a maintained version line. Where a date is given, support ends on that day — after it the vendor ships no more security updates for that line.
| Cycle | Latest version | End of support | Status |
|---|---|---|---|
| 26.05 | – | 126 days left | EOL 31 Dec |
| 25.11 | – | 58 days ago | End of Life |
| 25.05 | – | 239 days ago | End of Life |
| 24.11 | – | 423 days ago | End of Life |
| 24.05 | – | 604 days ago | End of Life |
| 23.11 | – | 788 days ago | End of Life |
| 23.05 | – | 970 days ago | End of Life |
| 22.11 | – | 1154 days ago | End of Life |
| 22.05 | – | 1335 days ago | End of Life |
| 21.11 | – | 1519 days ago | End of Life |
| 21.05 | – | 1700 days ago | End of Life |
| 20.09 | – | 1884 days ago | End of Life |
Which NixOS versions no longer receive security updates?
11 of 12 cycles have ended. If you run one of those lines, the vendor ships you no more patches — not even for critical flaws.
- NixOS 25.11
- NixOS 25.05
- NixOS 24.11
- NixOS 24.05
- NixOS 23.11
- NixOS 23.05
- NixOS 22.11
- NixOS 22.05
- NixOS 21.11
- NixOS 21.05
- NixOS 20.09
Where does the EOL data for NixOS come from?
From the open endoflife.date project, which collects vendors' official support commitments. patchletter reconciles the cycles daily; the NixOS data is as of 26/08/2026. In case of doubt the vendor's own lifecycle page applies — patchletter deliberately stores no vendor full texts.
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