{
  description = "Generate documentation for NixOS modules.";

  inputs.example-nix-minecraft.url = "github:12Boti/nix-minecraft";

  outputs = {
    self,
    nixpkgs,
    ... } @ inputs:
  let
    forAllSystems = f: nixpkgs.lib.genAttrs nixpkgs.lib.systems.flakeExposed (system: f {
      inherit system;
      pkgs = nixpkgs.legacyPackages.${system};
      lib  = nixpkgs.legacyPackages.${system}.lib;
      doc  = self.lib.${system};
    });
  in {
    inherit inputs;

    lib = forAllSystems ({ pkgs, ...}: pkgs.callPackage ./lib.nix { });

    packages = forAllSystems ({ pkgs, lib, doc, ...}: let
      mkJSON = name: modules: lib.pipe modules [
        doc.modules2options
        builtins.toJSON
        (pkgs.writeText "${name}.json")
      ];
    in {
      example-nix-minecraft-json = mkJSON     "nix-minecraft" inputs.example-nix-minecraft.lib.baseModules;
      example-nix-minecraft-html = doc.mkHTML "nix-minecraft" inputs.example-nix-minecraft inputs.example-nix-minecraft.lib.baseModules;
      #example-nix-minecraft = ;
    });

  };
}