anchor.diff:  # See historical versions of this file for building ktikz with KDE4.
   
   stdenv.mkDerivation rec {
  -  version = "unstable-20161122";
  +  version = "0.12";
     name = "qtikz-${version}";
   
     src = fetchFromGitHub {
       owner = "fhackenberger";
       repo = "ktikz";
  -    rev = "be66c8b1ff7e6b791b65af65e83c4926f307cf5a";
  -    sha256 = "15jx53sjlnky4yg3ry1i1c29g28v1jbbvhbz66h7a49pfxa40fj3";
  +    rev = version;
  +    sha256 = "1s83x8r2yi64wc6ah2iz09dj3qahy0fkxx6cfgpkavjw9x0j0582";
     };
  +
  +  patches = [ (fetchurl {
  +    url = "https://github.com/fhackenberger/ktikz/commit/972685a406517bb85eb561f2c8e26f029eacd7db.patch";
  +    sha256 = "16jwsl18marfw5m888vwxdd1h7cqa37rkfqgirzdliacb1cr4f58";
  +  })];
   
     meta = with stdenv.lib; {
       description = "Editor for the TikZ language";
  
positive.code:   '';
  
    # 1. Configuration is done by overwriting qtikzconfig.pri
    # 2. Recent Qt removed QString::fromAscii in favor of QString::fromLatin1
    patchPhase = ''
      echo "$conf" | sed "s!@out@!$out!g" > qmake/qtikzconfig.pri
      find -name "*.cpp" -exec sed -i s/fromAscii/fromLatin1/g "{}" \;
    '';
  
    configurePhase = ''
        qmake PREFIX="$out" ./qtikz.pro
    '';
  
    nativeBuildInputs = [ pkgconfig ];
    buildInputs = [ gettext qt5.full poppler ];
  
    enableParallelBuilding = true;
  
negative.code: { stdenv, fetchFromGitHub, fetchurl
  , gettext, poppler, qt5 , pkgconfig }:
  
  # Warning: You will also need a working pdflatex installation containing
  # at least auctex and pgf.
  