# Pastebin mvXcl6uB
let
  url =
  https://github.com/NixOS/nixpkgs/archive/7d36ae33df9ca87c03ed0040e476525db92a385f.tar.gz;
  sha256 = "1zqgy6jyhclz6c2vimg8nxchqmzq8553840sn2qb6jwfdslv21y3";
in
  if builtins.nixVersion >= "1.12" then
    fetchTarball { inherit url sha256; }
  else
    fetchTarball url