# Pastebin jxd0KOUP
let
  old-nixpkgs = import (fetchTarball {
    url = https://github.com/nixos/nixpkgs-channels/archive/61f0936d1cd73760312712615233cd80195a9b47.tar.gz;
    sha256 = "1fkmp99lxd827km8mk3cqqsfmgzpj0rvaz5hgdmgzzyji70fa2f8";
  }) {};
in