{ pkgs ? import <nixpkgs> { system = "x86_64-linux"; } }:
let
  build-article = pkgs.writeShellApplication {
    name = "build-article";
    runtimeInputs = with pkgs; [ which texliveFull emacs git ];
    text = builtins.readFile ./build/build-article.sh;
  };

  build-index = pkgs.writeShellApplication {
    name = "build-index";
    text = builtins.readFile ./build/build-index.sh;
  };


  articles = pkgs.stdenv.mkDerivation {
    name = "articles";
    src = builtins.filterSource
      (path: type: !(pkgs.lib.strings.hasPrefix "result" (baseNameOf path)))
      ./.;
    buildInputs = with pkgs; [ emacs git build-article build-index ];

    buildPhase = ''
      cp -a . $out
      cd $out
      mv index.html index.html.in
      find . -name 'articles/*.org' -exec build-article {} \;
      build-index > index.html
    '';
  };
in { inherit build-article articles; }