anchor.diff:  
   stdenv.mkDerivation rec {
   
  -  version = "2014.11.29";
  +  version = "2014.11.29-2";
   
     name = "pharo-vm-core-i386-${version}";
     system = "x86_32-linux";
  
positive.code: 
    sources10Zip = fetchurl {
      url = http://files.pharo.org/sources/PharoV10.sources.zip;
      md5 = "3476222a0345a6f8f8b6093b5e3b30fb";
    };
  
    sources20Zip = fetchurl {
      url = http://files.pharo.org/sources/PharoV20.sources.zip;
      md5 = "a145b0733f9d68d9ce6a76270b6b9ec8";
    };
  
    sources30Zip = fetchurl {
      url = http://files.pharo.org/sources/PharoV30.sources.zip;
      md5 = "bb0a66b8968ef7d0da97ec86331f68c8";
    };
  
    # Building
  
negative.code:     unzip ${sources10Zip} -d $prefix/lib/pharo-vm/
      unzip ${sources20Zip} -d $prefix/lib/pharo-vm/
      unzip ${sources30Zip} -d $prefix/lib/pharo-vm/
      unzip ${sources40Zip} -d $prefix/lib/pharo-vm/
    '';
  
    buildInputs = [ bash unzip cmake glibc openssl gcc mesa freetype xlibs.libX11 xlibs.libICE xlibs.libSM alsaLib cairo ];
  