anchor.diff:  
     postPatch = ''
       patchShebangs doc/ns3_html_theme/get_version.sh
  -    # FIX/Remove when https://github.com/NixOS/nixpkgs/pull/69310 gets merged
  -    sed -i 's/program.ns3_module_dependencies.copy()/program.ns3_module_dependencies[:]/g' wscript
     '';
   
     wafConfigureFlags = with stdenv.lib; [
  
positive.code: in
  stdenv.mkDerivation rec {
    pname = "ns-3";
    version = "32";
  
    src = fetchFromGitLab {
      owner = "nsnam";
  
negative.code:     sha256 = "158yjhsrmslj1q4zcq5p16hv9i82qnxx714l7idicncn0wzrfx7k";
    };
  
    nativeBuildInputs = [ wafHook python ];
  
    outputs = [ "out" ] ++ lib.optional pythonSupport "py";
  
  