anchor.diff:  { lib, fetchPypi, buildPythonPackage, python, pkg-config, libX11
   , SDL2, SDL2_image, SDL2_mixer, SDL2_ttf, libpng, libjpeg, portmidi, freetype
  +, fontconfig
   }:
   
   buildPythonPackage rec {
  
positive.code:     LOCALBASE=/ ${python.interpreter} buildconfig/config.py
    '';
  
    meta = with lib; {
      description = "Python library for games";
      homepage = "http://www.pygame.org/";
      license = licenses.lgpl21Plus;
      platforms = platforms.linux;
    };
  
negative.code:     portmidi libX11 freetype
    ];
  
    preConfigure = ''
      sed \
        -e "s/origincdirs = .*/origincdirs = []/" \
  