Nix ecosystem

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.

Software

Core Components of the Nix Ecosystem

Component	Manual	Description	Use	License
Nix	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
NixOS	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.	Declaratively configure desktops, servers & clusters	MIT
Nixpkgs	Nixpkgs Manual	The largest community maintained Nix package and NixOS module repository; standard releases of NixOS are hosted here.	Share Nix packages & NixOS modules	MIT
NixOps	NixOps Manual	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.	Deploy & provision NixOS systems, VMs & containers	LGPL-3.0
Hydra	Hydra Manual	A Nix based continuous build system.	CI build farms	GPL-3.0

In addition there are many other applications developed by the Nix community, utilizing and supporting these core technologies.

NixOps Deploy and manage large numbers of NixOS machines.
NixOS An OS and configuration system build on Nixpkgs.
Nixpkgs A large, community-maintained repository of packages.	Hydra A continuous build system build on Nix.
Nix A pure, functional build system.

Services

Non of the services are required to use Nix. And all the services are not affiliated with the NixOS Foundation.

Cachix

binary caches as a service. Free for public caches, subscription for private token-protected caches.

Hercules CI

simplify your CI setup with stateless build agents. Free for open source, per-user subscription for private repositories.

nixbuild.net

remote Nix builders as a service for x86_64 and AArch64. Pay-per-use.