Package Manager OS Language

Nix Get Nix

Reproducible builds, declarative environments, one toolchain for everything.

terminal
$ curl -sSf -L https://getnix.io/install | sh -s -- install

getnix.io/install redirects to the Determinate Nix Installer

macOS macOS Linux Linux WSL Docker Docker

How it works

One file,
all environments

One use case is to run nix develop to get an identical dev shell with every tool your project needs, on any machine.

01

Declarative

Pin exact versions in code

02

Reproducible

Same inputs, same output

03

Universal

Linux, macOS, WSL, CI

Read guides Docs
flake.nix terminal
# flake.nix
{
  description = "Go Dev Environment";

  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";

  outputs = { nixpkgs, ... }:
  let
    systems = [ "x86_64-linux" "aarch64-linux" "aarch64-darwin" ];
    forAllSystems = nixpkgs.lib.genAttrs systems;
  in {
    devShells = forAllSystems (system:
    let
      pkgs = nixpkgs.legacyPackages.${system};
    in {
      default = pkgs.mkShell {
        packages = with pkgs; [ go gopls golangci-lint delve ];
      };
    });
  };
}
terminal
$ nix develop

(nix) $ go version
go version go1.26.1 linux/amd64

(nix) $ which gopls dlv golangci-lint
/nix/store/…-gopls/bin/gopls
/nix/store/…-delve/bin/dlv
/nix/store/…-golangci-lint/bin/golangci-lint

Hands-on

Learn Nix by building

01

What is Nix?

A practical introduction to Nix — what it does, why it exists, and the core concepts you need before diving into real projects.

7 min Nix Beginner Concepts
02

Reproducible Go with Nix & Docker

Set up a Nix development environment for Go and build a Docker image with a byte-by-byte identical binary in development and production.

6 min Go Nix Docker
03

End Environment Drift: Manage macOS & Linux from a Single Nix Repo

Manage your entire desktop environment — dotfiles, applications, shell, system preferences — declaratively across macOS and Linux from a single repository.

8 min Nix Home Manager nix-darwin Dotfiles
04

AI + Nix: Run Anything, Install Nothing

Use Nix to give AI agents full host access to any software — including graphical applications — without permanently installing anything. Run ad-hoc, garbage collect when done.

9 min Nix AI nix run nix shell
05

Automatic NixOS Upgrades with Forgejo Actions

Keep NixOS servers and desktops up-to-date automatically — CI updates flake.lock, hosts self-upgrade daily, and you review a diff before anything deploys.

15 min NixOS Forgejo CI/CD Flakes
All guides

Explore

Nix ecosystem

Curated external resources to go further with Nix.

Reference

Documentation

Official tutorials and reference on nix.dev.

Distribution

NixOS

A Linux distro built entirely on Nix.

Concept

Flakes

Modern, reproducible Nix project structure.

Tool

Home Manager

Manage dotfiles and user config with Nix.

Search

Nixpkgs Search

Search 120,000+ packages in Nixpkgs.

Forum

Community

Nix Discourse forum for help and discussion.

Get started

Ready to try Nix?

Install in one command and follow a guide to build something real.

Install Nix Browse guides