NixOps 1.4 released Jul 20 2016
NixOps 1.4 has been released. This release contains contains many nice new features. See the manual for details.
NixOS 16.03 released May 01 2016
NixOS 16.03 “Emu” has been released, the fourth stable release branch. See the release notes for details. You can get NixOS 16.03 ISOs and VirtualBox appliances from the download page. For information on how to upgrade from older release branches to 16.03, check out the manual section on upgrading.
Nix 1.11 released Feb 19 2016
Nix 1.11 has been released. See the release notes for a list of changes and new features.
NixOS 15.09 released Oct 30 2015
NixOS 15.09 “Dingo” has been released, the fourth stable release branch. See the release notes for details. You can get NixOS 15.09 ISOs and VirtualBox appliances from the download page. For information on how to upgrade from older release branches to 15.09, check out the manual section on upgrading.
Nix 1.10 released Oct 03 2015
Nix 1.10 has been released. See the release notes for a list of changes and new features.
NixCon 2015 Sep 03 2015
NixCon logo We're happy to announce that NixCon 2015, the first Nix Conference, will take place on November 14—15th 2015 in Berlin. For more information, see the NixCon website. And please consider submitting a talk!
NixOS Foundation Aug 09 2015
The NixOS Foundation was started to improve our ability to maintain and extend the infrastructure used by the Nix related projects. If you would like to support us, please go here and donate some money!
Nix 1.9 released Jul 12 2015
Nix 1.9 has been released. See the release notes for a list of changes and new features.
NixOS 14.12 released Jan 30 2015
NixOS 14.12 “Caterpillar” has been released, the third stable release branch. It brings Linux 3.14, systemd 217, Glibc 2.20, KDE 4.14.1, and much more. See the release notes for details. You can get NixOS 14.12 ISOs and VirtualBox appliances from the download page. For information on how to upgrade from older release branches to 14.12, check out the manual section on upgrading.
Nix 1.8 released Jan 14 2015
Nix 1.8 has been released. See the release notes for a list of changes and new features.
NixOS sprint in Ljubljana Aug 30 2014
We’re having a NixOS sprint at the Kiberpipa hackerspace in Ljubljana, Slovenia, on August 23—27. Joining is free! For more information and to register, please go to the sprint page.
NixOS 14.04 released May 30 2014
NixOS 14.04 “Baboon” has been released, the second stable release branch. It brings Linux 3.12, systemd 212, GCC 4.8, Glibc 2.19, KDE 4.12, light-weight NixOS containers, and much more. See the release notes for details. You can get NixOS 14.04 ISOs and VirtualBox appliances from the download page. For information on how to upgrade a 13.10 system to 14.04, check out the manual section on upgrading.
NixOps 1.2 released May 30 2014
NixOps 1.2 has been released. This release contains contains many nice new features. See the manual for details.
Nix 1.7 released May 11 2014
Nix 1.7 has been released. See the release notes for a list of new features.
Heartbleed vulnerability in OpenSSL May 09 2014
A serious security vulnerability has been discovered in OpenSSL. All stable NixOS releases prior to version 13.10.35708.15a465c are vulnerable. (You can see your current version by running nixos-version.) To upgrade to the latest NixOS version, run nixos-rebuild switch --upgrade. You can verify whether you are safe by running
$ nix-store -qR /run/current-system | grep openssl
If this shows any OpenSSL version prior to 1.0.1g, you may be vulnerable.
FOSDEM talks Mar 02 2014
Domen Kožar gave a talk at FOSDEM about NixOS (video). Also, Ludovic Courtès gave a talk on Guix, the Nix- and Guile-based package manager.
Stdenv updates branch merged into master Feb 21 2014
The stdenv-updates branch has been merged into the master branch of Nixpkgs. The main change are that brings is that Nixpkgs/NixOS are now based on GCC 4.8 and Glibc 2.18, in addition to many smaller updates.
NixOS 13.10 released Dec 01 2013
We have released NixOS 13.10, the first stable branch of NixOS. Its goal is to provide a safe branch for production environments that need bug fixes and security updates, but not the potentially destabilising changes that sometimes occur on the unstable branch. You can get NixOS 13.10 ISOs and VirtualBox appliances from the download page. See the announcement for more information. For information on how to switch an existing NixOS machine from the unstable channel to 13.10, check out the manual section on upgrading.
Nix 1.6.1 released Nov 28 2013
Nix 1.6.1 has been released. This is primarily a bug fix release but has some minor new features. See the release notes for details.
NixOS sources merged into Nixpkgs Nov 10 2013
The NixOS Git tree has been merged into the Nixpkgs tree in order to simplify development. The sources now live in the nixos subdirectory of the Nixpkgs repository on GitHub. See the announcement for more information.
NixOps 1.1.1 released Nov 02 2013
NixOps 1.1.1 has been released. This release consists mostly of minor bugfixes. See the manual for details.
Nix 1.6 released Oct 10 2013
Nix 1.6 has been released. See the release notes for details.
NixOps 1.1 released Oct 09 2013
NixOps 1.1 has been released. This release brings a backend for Hetzner, a German data center provider, support for EC2 spot instances and some minor bugfixes. See the manual for details.
NixOS sprint in Slovenia Aug 15 2013
A sprint focused on NixOS and Kotti will be held 22-26 July 2013 in Lokve, Slovenia. It is organised by Termitnjak and sponsored by LogicBlox.
NixOps 1.0.1 released Aug 11 2013
NixOps 1.0.1 has been released, a minor bug fix release. See the manual for details.
NixOS presentation at EuroPython Aug 05 2013
Domen Kožar gave a presentation at EuroPython 2013: “NixOS Operating System: Declarative Configuration Distribution”.
NixOps 1.0 released Jul 25 2013
NixOps 1.0 has been released, the inaugural release of the NixOS cloud deployment tool. See the announcement and the manual for details.
Nix 1.5.3 released Jul 17 2013
Nix 1.5.3 has been released. This is primarily a bug fix release. See the release notes for details.
PhD thesis: A Reference Architecture for Distributed Software Deployment Jul 03 2013
Today Sander van der Burg successfully defended his PhD thesis entitled A Reference Architecture for Distributed Software Deployment! It describes (among other things) Disnix, a system for deployment of service-oriented architectures.
Nix 1.5.2 released Jun 13 2013
Nix 1.5.2 has been released. This is a bug fix release.
Nix 1.5.1 released Mar 28 2013
Nix 1.5.1 has been released. It fixes a regression introduced in Nix 1.4. See the release notes for details.
Nix 1.4 released Mar 26 2013
Nix 1.4 has been released. This is primarily a bug fix release that addresses a security problem in multi-user mode. See the release notes for details. For installation information, see the manual.
NixOS switched to systemd Feb 21 2013
NixOS has switched from Upstart to systemd! Systemd brings many advantages such as better dependency management, socket-based activation of services, per-service logging, cgroup-based process management, and much more. (Read the announcement.)
Nix 1.3 released Feb 05 2013
Nix 1.3 has been released. This is primarily a bug fix release. See the release notes for details. For installation information, see the manual.
Nix 1.2 released Jan 06 2013
Nix 1.2 has been released. See the release notes for details. For installation information, see the manual.
Nix 1.1 released Aug 18 2012
Nix 1.1 has been released. See the release notes for details. For installation information, see the manual.
Binary Nix tarballs available Jun 24 2012
Our continuous build system, Hydra, now produces binary tarball distributions of Nix for Mac OS X (Darwin), FreeBSD and Linux. The tarballs contain all dependencies of Nix, making it a lot easier to install Nix on those platforms. To install, download a binary tarball, unpack it in the root directory, then run nix-finish-install. See the manual for more information.
Nix 1.0 released Jun 11 2012
After almost two years of development, Nix 1.0 has been released. See the release notes for an overview of the most important improvements. For installation information, see the manual.
PatchELF 0.6 released Dec 07 2011
PatchELF 0.6 has been released. Apart from some bug fixes, it adds support for executables produced by the Gold linker. See the README for details.
Hydra talk at Inria Dec 03 2011
Hydra       logo Ludovic Courtès gave a talk on Hydra at Inria (which has its own Hydra instance for building Inria software) entitled “Hydra: continuous integration for demanding people”.
Moving to GitHub Nov 28 2011
The NixOS project is (slowly) migrating from Subversion to Git! The master repositories will be hosted in the NixOS organization on GitHub. For the moment, just a few subprojects have been migrated, such as Hydra and Charon. Thanks to Tianyi Cui for donating the NixOS GitHub organization.
Nix-dev mailing list moved Oct 14 2011
The nix-dev mailing list has moved. The address is now nix-dev@lists.science.uu.nl (web interface).
FOSDEM talk about NixOS Mar 05 2011
Fosdem logo Sander van der Burg gave a talk about NixOS at the CrossDistro track of FOSDEM (video, slides).
ISSRE paper on NixOS-based system testing Sep 18 2010
The paper “Automating System Tests Using Declarative Virtual Machines” (by Sander van der Burg and Eelco Dolstra) has been accepted for presentation at the 21st IEEE International Symposium on Software Reliability Engineering (ISSRE 2010). It describes how system tests with complex requirements on the environment (such as remote machines, network topologies, system services or root privileges) can be written succinctly using declarative specifications of the machines needed by the test environment. From these specifications we can automatically instantiate (networks of) virtual machines. This is what we use for automated regression testing of NixOS itself. A draft of the paper is available.
Xfce in NixOS Sep 18 2010
Xfce screenshot NixOS now supports Xfce, a modern, light-weight desktop environment. It can be enabled by setting the NixOS configuration value services.xserver.desktopManager.xfce.enable to true. (Screenshot)
Nix 0.16 released Sep 17 2010
Nix 0.16 has been released, featuring a much faster evaluator and support for configurable parallelism inside builders. See the release notes for details. For installation information, see the manual.
NixOS talk at LSM Aug 09 2010
Ludovic Courtès gave a talk about Nix and NixOS at the Libre Software Meeting in Bordeaux, entitled “NixOS: The Only Functional GNU/Linux Distribution” (slides).
Nix 0.15 released Apr 17 2010
Nix 0.15 has been released. This is a bug fix release. See the release notes for details. For installation information, see the manual.
Nix 0.14 released Mar 04 2010
Nix 0.14 has been released. This is primarily a bug fix release. See the release notes for details. For installation information, see the manual.
Nix logo Dec 25 2009
Nix       logo Long overdue, the Nix project finally has a logo! The logo was originally created by Simon Frankau for the Haskell logo competition, who kindly gave us permission to use it for the Nix project. (The snowflake motif is even more appropriate for Nix, because nix is Latin for snow.) Any further modifications are entirely our fault.
Nix 0.13 released Dec 05 2009
Nix 0.13 has been released. This is mostly a bug fix release, although it also adds some new language features. See the release notes for details. For installation information, see the manual.
LWN.net article on NixOS Jul 26 2009
LWN.net has an article about NixOS written by Koen Vervloesem.
Nixpkgs 0.12 released May 24 2009
Nixpkgs 0.12 has been released. See the release notes for details. Meanwhile, the Nixpkgs trunk has been updated to GCC 4.3.3, Glibc 2.9 and X.org 7.4.
OpenOffice.org 3 in Nixpkgs May 21 2009
OpenOffice.org 3.0.1 screenshot Lluís Batlle has updated OpenOffice.org in Nixpkgs to 3.0.1 (screenshot).
KDE 4.2 in Nixpkgs/NixOS May 07 2009
KDE 4.2 screenshot We now have a fairly complete set of KDE 4.2 packages in Nixpkgs and NixOS. Previously we had KDE 3.5, but it was rather incomplete: just kdelibs and kdebase. Now we have all that desktop goodness, such as kdemultimedia, kdenetwork and kdegames. You can enable KDE 4 in NixOS by setting the services.xserver.sessionType option to kde4. Thanks go to Yury G. Kudryashov, Andrew Morsillo and Sander van der Burg for doing the hard work on adding KDE 4 to Nixpkgs. (Screenshot 1, screenshot 2.)
Hydra Feb 05 2009
Hydra       logo Nix and NixOS releases are now built in Hydra, the new Nix-based continuous build system. Hydra replaces our old Nix-based build farm, which will be phased out soon. There are several advantages over the old build farm: the build tasks for a project are scheduled and published separately, so that for instance a (fast) tarball build doesn’t have to wait for a (slow) Cygwin build; build results are stored in a database, which will enable all sorts of interesting queries; better error reporting; a better web interface; and much more. We have written a draft paper about Hydra. There are some instructions available about how to set up your own Hydra server.
Linux.com article about Nix Jan 22 2009
There is an article on Linux.com about Nix: “Nix fixes dependency hell on all Linux distributions”.
Nix 0.12 released Dec 21 2008
Nix 0.12 has been released. The most important change is that Nix no longer needs Berkeley DB to store metadata, but there are many other improvements. See the release notes for details.
DisNix paper accepted at HotSWUp Oct 09 2008

The paper “Atomic Upgrading of Distributed Systems” (by Sander van der Burg, Eelco Dolstra and Merijn de Jonge) has been accepted for presentation at the First ACM Workshop on Hot Topics in Software Upgrades (HotSWUp). A draft of the paper is available. It describes Sander’s master’s thesis research on DisNix, an extension to Nix that allows deployment and upgrading of distributed systems from a single declarative description. We will continue this research in the Jacquard PDS project, which has now started. (We still have an opening for a PhD student or a postdoc; please contact us if you’re interested.)

NixOS paper accepted at ICFP! Jul 16 2008

The paper “NixOS: A Purely Functional Linux Distribution” (by Eelco Dolstra and Andres Löh) has been accepted for presentation at the 2008 International Conference on Functional Programming (ICFP). It describes NixOS in much greater detail than last year’s HotOS paper, and argues why the purely functional style and features such as laziness are important for system configuration management. It also provides some measurements on the actual purity of Nix build actions. A draft of the paper is available.

Website back up Jun 06 2008

The Nix website was down for a few days due to cooling problems in the server room causing the machine to overheat. These should be resolved now. Apologies for the inconvenience.

Website / SVN repositories moved May 25 2008

The Nix website has moved to nixos.org (hosted at TU Delft). The Subversion repositories have moved to svn.nixos.org. See this mailing list posting for information about moving existing SVN working copies.

LDTA 2008 paper May 05 2008

Eelco Dolstra presented the paper “Maximal Laziness — An Efficient Interpretation Technique for Purely Functional DSLs” at 8th Workshop on Language Description, Tools and Applications (LDTA 2008). It’s about caching of evaluation results in the Nix expression evaluator as a technique to make a simple term-rewriting evaluator efficient. Slides are here.

Jacquard grant proposal accepted! Mar 14 2008

The Jacquard program of NWO and EZ has granted funding for the Nix-related project “Pull Deployment of Services” (PDS), which is about improving the deployment of software and services in complex heterogenous environments. The grant consists of 368 K€ for a PhD student (4 years) and a postdoc (3 years). If you’re interested in these positions, please have a look at this page, and don’t hesitate to contact Eelco Visser or Eelco Dolstra.

New NixOS ISOs Feb 06 2008

NixOS installer online help New NixOS installation CD images for i686 and x86_64 are available, which is a good thing as the previous ones were already a few months old. The new images are Nix 0.11-based, contain Memtest86+ as a convenience, should support more SATA drives, and show online help (the NixOS manual) on virtual console 7.

Nix 0.11 released Jan 31 2008
Nix 0.11 has been released. This is a major new release representing over a year of development. The most important improvement is secure multi-user support. It also features many usability enhancements and language extensions, many of them prompted by NixOS, the purely functional Linux distribution based on Nix. See the release notes for details.
Nixpkgs 0.11 released Oct 12 2007
Nixpkgs 0.11 has been released. See the release notes for details.
OpenOffice in Nixpkgs Oct 10 2007

OpenOffice screenshot OpenOffice is now in Nixpkgs (screenshot of OpenOffice 2.2.1 running under NixOS, and another screenshot). Despite being a rather gigantic package (it takes two hours to compile on an Intel Core 2 6700), OpenOffice had only two “impurities” (references to paths outside of the Nix store) in its build process that had to be resolved — a reference to /bin/bash and one to /usr/lib/libjpeg.so.

Armijn Hemel, Wouter den Breejen and Eelco Dolstra contributed to the Nix expression for OpenOffice.

NixOS progress report Sep 22 2007

NixOS screenshot Wine now runs on NixOS! Finally we can run all those legacy applications... Thanks to Michael Raskin for adding Wine and a NPTL-enabled Glibc (which Wine seems to need). This is a nice application of purely functional package composition, by the way: Wine didn’t work with the standard Glibc in Nixpkgs, so we just pass it another Glibc at build time.

In other news, Nix 0.11 and Nixpkgs 0.11 will be released soon.

Commits mailing list Sep 14 2007

There is now a mailing list (nix-commits@cs.uu.nl) that you can subscribe to if you want to receive automatic commit notifications from the Nix Subversion repository.

HotOS paper on NixOS Jun 08 2007

Eelco Dolstra presented the paper Purely Functional System Configuration Management at the 11th Workshop on Hot Topics in Operating Systems (HotOS XI). It gives an overview of the ideas behind NixOS. The slides are also available.

NixOS progress report May 02 2007

KDE logo We now have KDE running on NixOS (obligatory screenshot). Just kdebase for now (Martin Bravenboer already added kdelibs a long time ago so that we could run the wonderful KCachegrind), but it contains all the important stuff (Konqueror, KDesktop, Kicker, Konsole, Control Center, etc.).

In related news, we can safely say that, rumours to the contrary notwithstanding, NixOS is not an April Fools’ Joke.

NixOS progress report Apr 05 2007
NixOS screenshot NixOS is now almost usable as a desktop OS ;-). We have an X server, a bunch of Gnome packages, basic wireless support, and of course all the applications in Nixpkgs that we had all along running on other Linux distributions. Here are a few screenshots:
NixOS manual Mar 19 2007
There is now some basic documentation for NixOS.
NixOS for x86_64 Feb 23 2007
NixOS now works on x86_64 machines. A 64-bit ISO is available.
New build farm hardware at TUD Feb 23 2007

New build farmTo quote Eelco Visser: new hardware for buildfarm at Delft University of Technology has arrived.

Here’s what we have: 5 Intel Core 2 Duo DualCore machines with 1GB RAM, 2 Mac minis with 1,83-GHz Intel Core Duo-processor, another Core 2 Duo a UPS to deal with spikes in power supply, a console with integrated monitor and keyboard switches, a rack with room for a couple more machines.

Here’s what we’re going to do with the goodies. The five Intel machines and the two MacMinis (also Intel) are going to be used to crank at building hundreds of software packages. Using virtualisation we should be able to run builds on multiple operating system distributions. Read more…

Nixpkgs 0.10 released Nov 12 2006
Nixpkgs 0.10 has been released. See the release notes for details.
Nix 0.10.1 released Nov 11 2006
Nix 0.10.1 has been released. It fixes two obscure bugs that shouldn’t affect most users.
Nix 0.10 released Nov 06 2006
Nix 0.10 has been released. This release has many improvements and bug fixes; see the release notes for details.
Nixpkgs 0.9 released Mar 03 2006
Nixpkgs 0.9 has been released.
PhD thesis defended Feb 18 2006
Eelco Dolstra defended his PhD thesis on the purely functional deployment model.
Nix 0.9.2 released Oct 21 2005
Nix 0.9.2 has been released released. This is a bug fix release that addresses some problems on Mac OS X.
Nix 0.9 released Oct 16 2005
Nix 0.9 has been released. This is a new major release that provides quite a few performance improvements and bug fixes, as well as a number of new features. Read the release notes for details.
Secure sharing paper accepted for ASE 2005 Aug 28 2005
The paper “Secure Sharing Between Untrusted Users in a Transparent Source/Binary Deployment Model” has been accepted at ASE 2005. This paper describes how a Nix store can be securely shared by multiple users who may not trust each other; i.e., how do we prevent one user from installing a Trojan horse that is subsequently executed by some other user?
Service deployment paper accepted for SCM-12 Aug 22 2005
The paper “Service Configuration Management” (accepted at the 12th International Workshop on Software Configuration Management) describes how we can rather easily deploy “services” (e.g., complete webserver configurations such as our Subversion server) through Nix by treating the non-component parts (such as configuration files, control scripts and static data) as components that are built by Nix expressions. The result is that all advantages that Nix offers to software deployment also extend to service deployment, such as the ability to easily have multiple configuration side by side, to roll back configurations, and to identify the precise dependencies of a configuration.
Patching paper accepted for CBSE 2005 Mar 17 2005
The paper “Efficient Upgrading in a Purely Functional Component Deployment Model” has been accepted at CBSE 2005. It describes how we can deploy updates to Nix packages efficiently, even if “fundamental” packages like Glibc are updated (which cause a rebuild of all dependent packages), by deploying binary patches between components in the Nix store. Includes techniques such as patch chaining and computing deltas between archive files.
Paper “Imposing a Memory Management Discipline on Software Deployment” accepted for presentation at ICSE 2004! Jan 16 2004
The first Nix paper.