anchor.diff:    
     src = fetchurl {
       url = "mirror://sourceforge/wxpython/wxPython-src-${version}.tar.bz2";
  -    sha256 = "af88695e820dd914e8375dc91ecb736f6fb605979bb38460ace61bbea494dc11";
  +    sha256 = "0qfzx3sqx4mwxv99sfybhsij4b5pc03ricl73h4vhkzazgjjjhfm";
     };
     
     buildInputs = [ pkgconfig wxGTK (wxGTK.gtk) pythonPackages.python pythonPackages.wrapPython ]
  
positive.code: 
  with stdenv.lib;
  
  let version = "3.0.0.0"; in
  
  if isPyPy then throw "wxPython-${version} not supported for interpreter ${python.executable}" else stdenv.mkDerivation {
    name = "wxPython-${version}";
  
negative.code:   meta = {
      platforms = stdenv.lib.platforms.all;
    };
  }
  