NixOS is a Linux distribution built on top of the Nix package manager. It uses declarative configuration and allows reliable system upgrades.

Release Released Security Support Latest
23.05 'Stoat' 1 year ago
(31 May 2023)
Ended 5 months ago
(31 Dec 2023)
23.05
22.11 'Raccoon' 1 year and 6 months ago
(30 Nov 2022)
Ended 11 months ago
(30 Jun 2023)
22.11
22.05 'Quokka' 2 years ago
(30 May 2022)
Ended 1 year and 5 months ago
(31 Dec 2022)
22.05
21.11 'Porcupine' 2 years and 6 months ago
(30 Nov 2021)
Ended 1 year and 11 months ago
(30 Jun 2022)
21.11
21.05 'Okapi' 3 years ago
(31 May 2021)
Ended 2 years and 5 months ago
(31 Dec 2021)
21.05
20.09 'Nightingale' 3 years and 7 months ago
(27 Oct 2020)
Ended 2 years and 11 months ago
(30 Jun 2021)
20.09
20.03 'Markhor' 4 years ago
(20 Apr 2020)
Ended 3 years and 7 months ago
(30 Oct 2020)
20.03
19.09 'Lori' 4 years and 8 months ago
(09 Oct 2019)
Ended 4 years ago
(30 Apr 2020)
19.09
19.03 'Koi' 5 years ago
(11 Apr 2019)
Ended 4 years and 7 months ago
(30 Oct 2019)
19.03
18.09 'Jellyfish' 5 years and 8 months ago
(05 Oct 2018)
Ended 5 years ago
(30 Apr 2019)
18.09
18.03 'Impala' 6 years ago
(04 Apr 2018)
Ended 5 years and 7 months ago
(30 Oct 2018)
18.03
17.09 'Hummingbird' 6 years and 8 months ago
(29 Sep 2017)
Ended 6 years ago
(30 Apr 2018)
17.09
17.03 'Gorilla' 7 years ago
(31 Mar 2017)
Ended 6 years ago
(30 Oct 2017)
17.03
16.09 'Flounder' 7 years ago
(30 Sep 2016)
Ended 7 years ago
(30 Apr 2017)
16.09
16.03 'Emu' 8 years ago
(31 Mar 2016)
Ended 7 years ago
(30 Oct 2016)
16.03
15.09 'Dingo' 8 years ago
(30 Sep 2015)
Ended 8 years ago
(30 Apr 2016)
15.09
14.12 'Caterpillar' 9 years ago
(30 Dec 2014)
Ended 8 years ago
(30 Sep 2015)
14.12
14.04 'Baboon' 10 years ago
(30 Apr 2014)
Ended 9 years ago
(31 Jan 2015)
14.04
13.10 'Aardvark' 10 years ago
(31 Oct 2013)
Ended 10 years ago
(31 May 2014)
13.10

There is also the Unstable release which is always supported and receives updates most frequently.

If you’re looking for nix, the package manager NixOS is based-on click here

More information is available on the NixOS website.

You should be running one of the supported release numbers listed above in the rightmost column.

You can check the version that you are currently using by running:
cat /etc/os-release

You can submit an improvement to this page on GitHub :octocat: . This page has a corresponding Talk Page.

A JSON version of this page is available at /api/nixos.json. See the API Documentation for more information. You can subscribe to the iCalendar feed at /calendar/nixos.ics.