anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "libical";
  -  version = "3.0.7";
  +  version = "3.0.8";
   
     outputs = [ "out" "dev" ]; # "devdoc" ];
   
  
positive.code:     owner = "libical";
      repo = "libical";
      rev = "v${version}";
      sha256 = "1ppf8jlpiclq3jprhx889y5lgf6lc2q4d8wy2zavzsxgnsqf67il";
    };
  
    nativeBuildInputs = [
  
negative.code:   '';
  
    meta = with stdenv.lib; {
      homepage = "https://github.com/libical/libical";
      description = "An Open Source implementation of the iCalendar protocols";
      license = licenses.mpl20;
      platforms = platforms.unix;
  