anchor.diff:      opensslSupport = openssl != null;
       tkSupport = (tk != null) && (tcl != null);
       libPrefix = "python2.5";
  -  };
  -}
  +  } ;
  +} // (if stdenv.system == "i686-darwin" then { NIX_CFLAGS_COMPILE = "-msse2" ; } else {} ) )
  
positive.code:   inherit buildInputs;
    C_INCLUDE_PATH = concatStringsSep ":" (map (p: "${p}/include") buildInputs);
    LIBRARY_PATH = concatStringsSep ":" (map (p: "${p}/lib") buildInputs);
    
    configureFlags = "--enable-shared --with-wctype-functions";
    
    preConfigure = ''
  
negative.code: 
  in
  
  stdenv.mkDerivation ( {
    name = "python-2.5.4";
    
    src = fetchurl {
  