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 81 days. The current version of NixOS is 26.05. The cycles come from the open endoflife.date project, last reconciled on 30/09/2026.
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 | – | 81 days left | EOL in 81 days |
| 25.11 | – | 103 days ago | End of Life |
| 25.05 | – | 284 days ago | End of Life |
| 24.11 | – | 468 days ago | End of Life |
| 24.05 | – | 649 days ago | End of Life |
| 23.11 | – | 833 days ago | End of Life |
| 23.05 | – | 1015 days ago | End of Life |
| 22.11 | – | 1199 days ago | End of Life |
| 22.05 | – | 1380 days ago | End of Life |
| 21.11 | – | 1564 days ago | End of Life |
| 21.05 | – | 1745 days ago | End of Life |
| 20.09 | – | 1929 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 30/09/2026. In case of doubt the vendor's own lifecycle page applies — patchletter deliberately stores no vendor full texts.
New NixOS versions by email
Tick the product and patchletter reports new releases by email. The update email costs nothing, and one click stops it again. The warning 90, 30 and 7 days before support ends is part of patchletter Pro.