OCaml-focused custom Nix Overlays

This repo contains a set of custom overlays and upgrades over the upstream nixpkgs set of (mostly) OCaml packages, and a few other curated derivations.

Using this set of packages

With Flakes

In your flake.nix:

{
  # Use this repo as the `nixpkgs` URL
  inputs.nixpkgs.url = "github:nix-ocaml/nix-overlays";


  outputs = { self, nixpkgs }:
    let
      pkgs = nixpkg.legacyPackages.${"YOUR_SYSTEM_STRING"};
    in
    {
      ...
    };
}

Alternative (advanced)

{
  inputs.nixpkgs.url = "github:nixOS/nixpkgs";

  inputs.ocaml-overlay.url = "github:nix-ocaml/nix-overlays";
  inputs.ocaml-overlay.inputs.nixpkgs.follows = "nixpkgs";


  outputs = { self, nixpkgs, ocaml-overlay }:
    let
      system = "YOUR_SYSTEM_STRING";
      pkgs = import nixpkgs {
        inherit system;
        overlays = [
          ocaml-overlay.overlays.${system}
        ];
      };
    in
    {
      ...
    };
}

Without Flakes

let
  nixpkgs-sources =
    builtins.fetchTarball
      https://github.com/nix-ocaml/nix-overlays/archive/master.tar.gz;
  pkgs = import nixpkgs-sources { };
in

pkgs

Alternative (advanced)

let
  nixpkgs-sources =
    builtins.fetchTarball
      https://github.com/nix-ocaml/nix-overlays/archive/master.tar.gz;

  custom-nixpkgs = /path/to/custom/nixpkgs;

  pkgs = import custom-nixpkgs {
    overlays = [
      (import "${nixpkgs-sources}/overlay" custom-nixpkgs)
    ];
  };
in

pkgs

License

Copyright (c) 2023 António Nuno Monteiro.

See the MIT License text.

Note: MIT license does not apply to the packages built by nix-overlays, merely to the files in this repository (the Nix expressions, build scripts, NixOS modules, etc.). It also might not apply to patches included in the repository, which may be derivative works of the packages to which they apply. The aforementioned artifacts are all covered by the licenses of the respective packages.