Language-specific package helpers

The Nixpkgs-provided helpers can be found in the Nixpkgs manual.

Elisp

• emacs2nix

Erlang

• hex2nix
• nix-rebar3 Builds rebar3 projects, without any Nix code generation.

Go

• go2nix
• dep2nix
• For go 1.11+ modules: vgo2nix
• gomod2nix

Haskell

• cabal2nix
• haskell-overridez - Simplify usage of nix dependencies during haskell development
• snack

JavaScript / Node.js

• node2nix, Recommend for use in nixpkgs
• napalm, Imports package-lock.json into nix directly
• yarn-based (carry the same name but different implementations), yarn is a drop-in for `npm`:
  • yarn2nix by moretea
  • yarn2nix by Profpatsch
  • [1]
• bower2nix

PureScript

• purs-nix

Lua

• luarocks2nix works with https://github.com/NixOS/nixpkgs/pull/33903

OCaml

• opam2nix

Perl

• cpan2nix

Python

• poetry2nix - poetry2nix turns Poetry projects into Nix derivations without the need to actually write Nix expressions.
• nixpkgs-pytools - semi-automated way to add python packages to nixpkgs.
• pynixify - Create a nixpkgs overlay with human-readable expressions for each package
• pip2nix - Generate nix expressions for Python packages.

Abandoned / discontinued:

• pypi2nix - Generate Nix expressions for Python packages
• python2nix
• nix-pip
• mach-nix - Create reproducible python environments from `requirements.txt` (using Nix)

Ruby

• bundix

Rust

• naersk Pure nix, works well with dependencies from crates.io. Builds rust crates dependencies in one derivation and the crate itself in another.
• crate2nix Uses `buildRustCrate` from `nixpkgs` to build all dependencies independently. Either check in the generated build file or use it via "import from derivation".
• cargo2nix Uses a `mkCrate` wrapper around Cargo and `rustc` to build all dependencies independently. Supports cross-compilation, alternative registries, and `nix-shell` integration.
• crane Builds rust crate dependencies in one derivation and the crate itself in another. Boilerplate setup for running test suites.

Scala

• sbtix