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The ''Nix Ecosystem'' is a collection of technologies designed to reproducibly build and declaratively configure and manage packages and systems as well as their dependencies. It achieves this by translating the functional paradigm from the program to the system domain by utilizing a dynamic, functional and lazy DSL called the [[Nix Expression Language]] for specifying reproducible builds.  
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The '''Core Nix Ecosystem''' is a collection of technologies designed to reproducibly build and declaratively configure and manage packages and systems as well as their dependencies. It achieves this by translating the functional paradigm from the program to the system domain by utilizing a dynamic, functional and lazy DSL called the [[Overview of the Nix Language|Nix Language]] for specifying reproducible builds.  


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In addition there are many other [[applications]] ('''''Extended Nix Ecosystem)''''' developed by the Nix community, utilizing and supporting these core technologies.
== Official ecosystem == <!--T:3-->
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{| class="wikitable"
{| class="wikitable"
|+ Core Components of the Nix Ecosystem:
|+ Core Components of the Nix Ecosystem
|-
|-
| ''Component''
! Component
| ''Description''
! Manual
| ''Usecases''
! Description
|-
! Use
| [[Nix Package Manager]]
! License
| A package manager that parses the [[Nix Expression Language]] to specify reproducible build processes. Nix stores the results into hashed addresses, allowing multiple versions of the same package to live side by side.
| Package management in Linux & Darwin • Reproducible building of applications & containers in production
|-  
|-  
| [[NixOS]]
| [[NixOS]]
| [https://nixos.org/nixos/manual/ NixOS Manual]
| A Linux distribution with ''all'' components built by Nix, and thus supporting reproducible and declarative system-wide configuration management as well as atomic upgrades and rollbacks.  
| A Linux distribution with ''all'' components built by Nix, and thus supporting reproducible and declarative system-wide configuration management as well as atomic upgrades and rollbacks.  
| Declarative Configuration Management • Desktop Systems •  Server Systems • Cluster Computing
| Declaratively configure desktops, servers & clusters
| MIT
|-
|-
| [[Nixpkgs]]
| [[Nixpkgs]]
| [https://nixos.org/nixpkgs/manual/ Nixpkgs Manual]
| The largest community maintained Nix package and NixOS module repository; standard releases of NixOS are hosted here.
| The largest community maintained Nix package and NixOS module repository; standard releases of NixOS are hosted here.
| Finding & Sharing Nix Packages • Contributing to NixOS
| Share Nix packages & NixOS modules
|-
| MIT
| [[NixOps]]
| A Nix based deployment and provisioning tool allowing declarative specification of remote NixOS systems, VMs and containers; supports AWS, Hetzner, GCE and some other cloud providers out of box.
| Deploying NixOS configurations to bare-metal, virtual machines and containers
|-
|-
| [[Hydra]]
| [[Hydra]]
| [https://nixos.org/hydra/manual/ Hydra Manual]
| A Nix based continuous build system.
| A Nix based continuous build system.
| Hosting a build farm for continuous integration scenarios
| CI build farms
| GPL-3.0
|-
| [[Nix]]
| [https://nixos.org/nix/manual/ Nix Manual]
| A package manager that parses Nix expressions specifying reproducible build, putting the result in a store address with a hash of the dependency tree, sidestepping dependency hell and supporting multiversion installs and rollbacks.
| Reproducible builds & package management in Linux & Darwin
| LGPL-2.1
|}  
|}  


In addition there are many other [[applications]] developed by the Nix community, utilizing and supporting these core technologies.
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{| style="max-width: 36rem; margin: auto;"
|+'''The NixOS core ecosystem stack'''
|style="text-align: center; border: 1px solid #ddd; background: #fafafa; padding: 1.6rem" width="2%"|
<div style="font-size: 1.3em; font-weight: bold">NixOS</div>
A Linux distribution and configuration system built using Nixpkgs.
!
|-
|style="text-align: center; border: 1px solid #ddd; background: #fafafa; padding: 1.6rem" width="2%"|
<div style="font-size: 1.3em; font-weight: bold">Nixpkgs</div>
A large, community-maintained repository of packages.
|style="text-align: center; border: 1px solid #ddd; background: #fafafa; padding: 1.6rem" width="2%"|
<div style="font-size: 1.3em; font-weight: bold">Hydra</div>
A continuous build system built on Nix.
|-
|style="text-align: center; border: 1px solid #ddd; background: #fafafa; padding: 1.6rem" width="2%" colspan="2"|
<div style="font-size: 1.3em; font-weight: bold">Nix</div>
A pure and functional build system.
|}
 
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== Usage of NixOS ==
Users install the ''NixOS'' distribution on their computers just as any other Linux distribution. They read about packages to install and configuration options in ''Nixpkgs'' via https://search.nixos.org and this wiki. They use the ''Nix'' language to declaratively describe in a text file what software packages should be installed and how the system should be configured. They run 2 command line programs in a terminal to transform the system into the described system. They use the system as any other Linux system.
 
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== Development of NixOS ==
Developers of ''NixOS'' mainly work on ''Nixpkgs'' to describe in text files in ''Nix'' language how software packages should be build. After peer review these changes are integrated in ''Nixpkgs''. Some of these packages are pre built on ''Hydra'' to reduce the update time for ''NixOS'' users.


[[File:Nixos-stack2.png|link=]]


[[Category:Discussion]]
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[[Category:Ecosystem]]
[[Category:Pedias]]
[[Category:Incomplete]]
[[Category:NixOS]]
[[Category:nix]]
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Retrieved from "https://wiki.nixos.org/wiki/Nix_ecosystem"