{
  pkgs ? (import <nixpkgs> { }),
  lib ? pkgs.lib,
}:
let
  types = pkgs.runCommand "dnscontrol-types" {
    runtimeInputs = [ pkgs.dnscontrol ];
  } "${lib.getExe pkgs.dnscontrol} write-types -o $out";
  update-types = ''
    f="types-dnscontrol.d.ts"
    if [[ -e "$f" && ! -L "$f" ]]
    then
      echo "warn: file $f already exists, not updating. Remove to enable automatic updates." >&2
    elif [[ ! ( -L "$f" && "$(readlink -f "$f")" == "${types}" ) ]]
    then
      ln -sf "${types}" "$f"
    fi
  '';
in
pkgs.mkShellNoCC {
  packages = with pkgs; [
    dnscontrol
    prettier

    # fallback for using lorri (shellHook doesn't work as expected)
    (writeShellScriptBin "update-types" update-types)
  ];
  shellHook = update-types;
}