# Pastebin L6TnP4hE
let
  url = https://github.com/NixOS/nixpkgs/archive/376d960034d90c33b9a59db168151b18ccb8bdc5.tar.gz;
  sha256 = "1srd8xbfn64b1394lw7zwfrg5bmnh6sdva9h1ac3737qykv0zf1v";
in
  if builtins.nixVersion >= "1.12" then
    fetchTarball { inherit url sha256; }
  else
    fetchTarball url