import (fetchTarball {
  url = "https://github.com/NixOS/nixpkgs/archive/24c9b05ac53e422f1af81a156f1fd58499eb27fb.tar.gz";
  sha256 = "1aw5zxd91rzvvzqk8zi5qrnkjsgf4nv77pa3jbpsymhpwr0gj5i3";
})