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Nixpkgs Manual
Version 26.11pre
Preface
Overview of Nixpkgs
Package your first application
Using Nixpkgs
Platform Support
Global configuration
Overlays
Overriding
Nixpkgs Lib
Functions reference
Library Functions
lib.asserts: assertion functions
lib.attrsets: attribute set functions
lib.strings: string manipulation functions
lib.versions: version string functions
lib.trivial: miscellaneous functions
lib.fixedPoints: explicit recursion functions
lib.lists: list manipulation functions
lib.debug: debugging functions
lib.options: NixOS / nixpkgs option handling
lib.path: path functions
lib.filesystem: filesystem functions
lib.fileset: file set functions
lib.sources: source filtering functions
lib.cli: command-line serialization functions
lib.gvariant: GVariant formatted string serialization functions
lib.fetchers: functions which can be reused across fetchers
lib.generators: functions that create file formats from nix data structures
lib.customisation: Functions to customise (derivation-related) functions, derivations, or attribute sets
lib.meta: functions for derivation metadata
lib.derivations: miscellaneous derivation-specific functions
Generators
Debugging Nix Expressions
prefer-remote-fetch overlay
pkgs.nix-gitignore
Module System
Standard Environment
Standard environment
The Standard Environment
Meta-attributes
Passthru-attributes
Multiple-output packages
Cross-compilation
Platform Notes
Toolchains
The LLVM Toolchain
Builders
Build helpers
Fetchers
Trivial build helpers
Fixed-point arguments of build helpers
Development Shell helpers
Testers
Special build helpers
buildFHSEnv
fakeNss
pkgs.makeSetupHook
pkgs.mkShell
darwin.linux-builder
vmTools
Images
pkgs.appimageTools
pkgs.dockerTools
pkgs.ociTools
pkgs.portableService
<nixpkgs/nixos/lib/make-disk-image.nix>
pkgs.mkBinaryCache
Hooks reference
Autoconf
Automake
autoPatchelfHook
breakpointHook
cmake
gdk-pixbuf
GHC
GNOME platform
installShellFiles
libglycin
libiconv, libintl
libxml2
Meson
mpiCheckPhaseHook
ninja
patchRcPath hooks
Perl
pkg-config
pnpmBuildHook
postgresqlTestHook
Python
scons
teTeX / TeX Live
unzip
validatePkgConfig
versionCheckHook
wafHook
xcbuildHook
Languages and frameworks
Agda
Android
Astal
BEAM Languages (Erlang, Elixir & LFE)
CHICKEN
COSMIC
Crystal
CUDA
Cue (Cuelang)
D (Dlang)
Dart
Dhall
Dotnet
Emscripten
Factor
GNOME
Go
Gradle
Hare
Haskell
Hy
Idris
Idris2
iOS
Java
Javascript
Julia
Lean 4
lisp-modules
Lua
Maven
Neovim
Nim
OCaml
Octave
Perl
PHP
pkg-config
Python
Qt
R
Rocq and rocq packages
Ruby
Rust
Scheme
Swift
Tcl
TeX Live
Typst
Vim
Packages
Build Support
Cataclysm: Dark Days Ahead
Citrix Workspace
DLib
Eclipse
Elm
Emacs
Firefox
Fish
Friction
FUSE
Geant4
ibus-engines.typing-booster
Inkscape
Kakoune
Krita
LHAPDF
Linux kernel
Locales
/etc files
Nginx
nrfutil
OpenGL
Python Tree Sitter
Interactive shell helpers
Steam
treefmt
Urxvt
uv
VCPKG
WeeChat
Modules
Modules
Generic
meta-maintainers.nix
Development of Nixpkgs
Opening issues
Coding conventions
Interoperability Standards
CycloneDX
nix
namespace
nix:narinfo
nix:fod
Release Notes
Release Notes
Nixpkgs 26.11 ("Zokor", 2026.11/??)
Nixpkgs 26.05 ("Yarara", 2026.05/30)
Nixpkgs 25.11 ("Xantusia", 2025.11/30)
Nixpkgs 25.05 (2025.05/23)
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Standard environment