anchor.diff:      sha256 = "16jwsl18marfw5m888vwxdd1h7cqa37rkfqgirzdliacb1cr4f58";
     })];
   
  -  meta = with stdenv.lib; {
  -    description = "Editor for the TikZ language";
  -    homepage = "https://github.com/fhackenberger/ktikz";
  -    license = licenses.gpl2;
  -    platforms = platforms.linux;
  -    maintainers = [ maintainers.layus ];
  -  };
  +  QT_PLUGIN_PATH = "${qt5.qtbase}/${qt5.qtbase.qtPluginPrefix}";
   
  -  conf = ''
  -    # installation prefix:
  -    PREFIX = @out@
  +  nativeBuildInputs = [ pkgconfig qt5.qttools qt5.qmake makeWrapper ];
  +  buildInputs = [ qt5.qtbase poppler ];
  +  enableParallelBuilding = true;
   
  -    # install desktop file here (*nix only):
  -    DESKTOP_INSTALL_DIR = @out@/share/applications
  +  qmakeFlags = [
  +    "DESKTOP_INSTALL_DIR=${placeholder "out"}/share/applications"
  +    "MIME_INSTALL_DIR=${placeholder "out"}/share/mime/packages"
  +    # qcollectiongenerator does no more exist in `qt5.qttools`.
  +    # It was merged with qhelpgenerator at some point.
  +    "QCOLLECTIONGENERATORCOMMAND=qhelpgenerator"
  +  ];
   
  -    # install mimetype here:
  -    MIME_INSTALL_DIR = @out@/share/mime/packages
  -
  -    # install doc here:
  -    MAN_INSTALL_DIR = @out@/share/man
  -
  -    CONFIG -= debug
  -    CONFIG += release
  -
  -    # qmake command:
  -    QMAKECOMMAND = qmake
  -    # lrelease command:
  -    LRELEASECOMMAND = lrelease
  -    # qcollectiongenerator command:
  -    QCOLLECTIONGENERATORCOMMAND = qhelpgenerator
  -
  -    # TikZ documentation default file path:
  -    TIKZ_DOCUMENTATION_DEFAULT = @out@/share/doc/texmf/pgf/pgfmanual.pdf.gz
  +  postFixup = ''
  +    wrapProgram "$out/bin/qtikz" \
  +      --prefix QT_PLUGIN_PATH : "${qt5.qtbase}/${qt5.qtbase.qtPluginPrefix}" \
  +      --prefix PATH : "${gnuplot}/bin"
     '';
  -
  -  # 1. Configuration is done by overwriting qtikzconfig.pri
  -  postPatch = ''
  -    echo "$conf" | sed "s!@out@!$out!g" > qmake/qtikzconfig.pri
  -  '';
  -
  -  configurePhase = ''
  -      qmake PREFIX="$out" ./qtikz.pro
  -  '';
  -
  -  nativeBuildInputs = [ pkgconfig qt5.qttools ];
  -  buildInputs = [ gettext qt5.full poppler ];
  -
  -  enableParallelBuilding = true;
   }
  
positive.code: { stdenv, fetchFromGitHub, fetchurl
  , gettext, poppler, qt5 , pkgconfig }:
  
  # Warning: You will also need a working pdflatex installation containing
  # at least auctex and pgf.
  
  # This package only builds ktikz without KDE integration because KDE4 is
  # deprecated and upstream does not (yet ?) support KDE5.
  
negative.code: 
  stdenv.mkDerivation rec {
    version = "0.12";
    pname = "qtikz";
  
    meta = with stdenv.lib; {
      description = "Editor for the TikZ language";
      homepage = "https://github.com/fhackenberger/ktikz";
      license = licenses.gpl2;
      platforms = platforms.linux;
      maintainers = [ maintainers.layus ];
      long_description = ''
        You will also need a working *tex installation in your PATH, containing at least `preview` and `pgf`.
      '';
    };
  
    src = fetchFromGitHub {
      owner = "fhackenberger";
  