anchor.diff:  { lib
   , stdenv
  -, openglSupport ? true
  -, libX11
  -, pyopengl
   , buildPythonPackage
   , fetchPypi
   , pkgconfig
  -, libjpeg
  -, libtiff
  -, SDL
  -, gst-plugins-base
  -, libnotify
  -, freeglut
  -, xorg
   , which
   , cairo
  -, requests
   , pango
  -, pathlib2
   , python
   , doxygen
   , ncurses
  -, libpng
  -, gstreamer
   , wxGTK
  +, numpy
  +, pillow
  +, six
   }:
   
   buildPythonPackage rec {
  
positive.code:     wrapPythonPrograms
    '';
  
    passthru = { inherit wxGTK openglSupport; };
  
  
    meta = {
  
negative.code:   doCheck = false;
  
    nativeBuildInputs = [ pkgconfig which doxygen wxGTK ];
    buildInputs = [ ncurses wxGTK.gtk ];
  
    hardeningDisable = [ "format" ];
  
  