let
  sources = import ../nix/sources.nix;
  pkgs = import sources.nixpkgs { };
  dhall = pkgs.callPackage ../nix/dhall.nix { };
in pkgs.stdenv.mkDerivation {
  name = "lewa-dictionary";
  src = ./.;
  phases = "buildPhase installPhase";

  buildInputs = [ sources.dhall-lang ];

  DHALL_PRELUDE = "${sources.dhall-lang}/Prelude/package.dhall";

  buildPhase = ''
    env | grep ^DHALL
    ${dhall}/bin/dhall text --file $src/utils/showDictionary.dhall > dictionary.md
  '';

  installPhase = ''
    mkdir -p $out
    cp dictionary.md $out/dictionary.md
  '';
}