let
  second = first;
  first = 1;
  nested = let
    nestedFirst = first;
    nestedSecond = nestedFirst;
  in {
    result = nestedSecond;
  };
in {
  package = package;
  from = pkgs.from;
  url = https://example.com;
  firstField = first;
  secondField = second;
  nestedField = nested;
}