anchor.diff:         # disable test_zipfile64 because it randomly timeouts
          # disable test_cpickle because timeouts
          # disable test_ssl because no shared cipher' not found in '[Errno 1] error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure
  -      ./pypy-c ./pypy/test_all.py --pypy=./pypy-c -k 'not (test_ssl or test_cpickle or test_sqlite or test_urllib2net or test_urllibnet or test_urllib2_localnet or test_socket or test_os or test_shutil or test_mhlib or test_multiprocessing or test_zipfile64)' lib-python
  +       # disable test_epoll because of invalid arg, should be fixed in as of version 5.1.2
  +      ./pypy-c ./pypy/test_all.py --pypy=./pypy-c -k 'not (test_ssl or test_cpickle or test_sqlite or test_urllib2net or test_urllibnet or test_urllib2_localnet or test_socket or test_os or test_shutil or test_mhlib or test_multiprocessing or test_zipfile64 or test_epoll)' lib-python
       '';
   
       installPhase = ''
  
positive.code: 
      src = fetchurl {
        url = "https://bitbucket.org/pypy/pypy/get/release-${version}.tar.bz2";
        sha256 = "1g7iipllgdfjgdkypsa1g2pzxgjw9agp40rh82hk31rsbak2hfbl";
      };
  
      buildInputs = [ bzip2 openssl pkgconfig pythonFull libffi ncurses expat sqlite tk tcl xlibsWrapper libX11 makeWrapper gdbm db ]
  
negative.code: 
  let
  
    majorVersion = "5.1.1";
    version = "${majorVersion}";
    libPrefix = "pypy${majorVersion}";
  
    pypy = stdenv.mkDerivation rec {
  