anchor.diff:  with stdenv.lib;
   
   let
  -  version = "2.2.6";
  +  version = "2.2.7";
     variant = if withGtk then "gtk" else if withQt then "qt" else "cli";
   
   in stdenv.mkDerivation {
  
positive.code:   enableParallelBuilding = true;
  
    meta = with stdenv.lib; {
      homepage = http://www.wireshark.org/;
      description = "Powerful network protocol analyzer";
      license = licenses.gpl2;
  
  
negative.code: 
    src = fetchurl {
      url = "http://www.wireshark.org/download/src/all-versions/wireshark-${version}.tar.bz2";
      sha256 = "1dfvhra5v6xhzbp097qsxi0zvirw0srbasl4v1wjf58v49idz7b8";
    };
  
    nativeBuildInputs = [
  