anchor.diff: -{ lib, stdenv
  +{ stdenv
  +, lib
   , fetchFromGitHub
   , nixosTests
   , substituteAll
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "xdg-desktop-portal";
    version = "1.8.1";
  
    outputs = [ "out" "installedTests" ];
  
  
negative.code:     owner = "flatpak";
      repo = pname;
      rev = version;
      sha256 = "Q1ZP/ljdIxJHg+3JaTL/LIZV+3cK2+dognsTC95udVA=";
    };
  
    patches = [
  