anchor.diff:  
   let
     minor = "3.16";
  -  version = "${minor}.0";
  +  version = "${minor}.1";
   in
   
   buildPythonApplication rec {
  
positive.code:     homepage = http://meldmerge.org/;
      license = stdenv.lib.licenses.gpl2;
      platforms = platforms.linux ++ stdenv.lib.platforms.darwin;
    };
  }
  
negative.code: 
    src = fetchurl {
      url = "mirror://gnome/sources/meld/${minor}/meld-${version}.tar.xz";
      sha256 = "1bec697aa1ababa315ca8241ade65dc68ea87f0d316632f590975afcf967cfab";
    };
  
    buildInputs = [
  