NixOS 19.03Koi
NixOS 19.03 was released on Apr 11, 2019 and reached end of life on Oct 30, 2019. It no longer receives security updates.
NixOS 19.03 support timeline
Apr 11, 2019Ended
100% elapsedEnd of life
Oct 30, 2019
NixOS 19.03 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 19.03 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 21.05 Okapi | May 31, 2021 | Dec 31, 2021 |
| NixOS 20.09 Nightingale | Oct 27, 2020 | Jun 30, 2021 |
| NixOS 20.03 Markhor | Apr 20, 2020 | Oct 30, 2020 |
| NixOS 19.09 Loris | Oct 9, 2019 | Apr 30, 2020 |
| NixOS 19.03 Koi | Apr 11, 2019 | Oct 30, 2019 |
| NixOS 18.09 Jellyfish | Oct 5, 2018 | Apr 30, 2019 |
| NixOS 18.03 Impala | Apr 4, 2018 | Oct 30, 2018 |
NixOS 19.03: common questions
When does NixOS 19.03 reach end of life?
NixOS 19.03 reached end of life on Oct 30, 2019, according to endoflife.date.
Is NixOS 19.03 still supported?
No. NixOS 19.03 has reached end of life and no longer receives security updates. Upgrade to NixOS 26.05 to stay supported.
When was NixOS 19.03 released?
NixOS 19.03 was released on Apr 11, 2019.
What is the codename of NixOS 19.03?
NixOS 19.03 is codenamed “Koi”.
What should I upgrade NixOS 19.03 to?
NixOS 26.05 is the next release that is still supported (until Dec 31, 2026).