examples.txt not in source tarball (but setup.py needs it to build images)

python setup.py --build-images
Traceback (most recent call last):
  File "setup.py", line 24, in <module>
    build_images()
  File "setup.py", line 20, in build_images
    doctest.testfile(fn, optionflags=doctest.ELLIPSIS)
  File "/usr/lib/python2.6/doctest.py", line 1937, in testfile
    text, filename = _load_testfile(filename, package, module_relative)
  File "/usr/lib/python2.6/doctest.py", line 219, in _load_testfile
    return open(filename).read(), filename
IOError: [Errno 2] No such file or directory: 'examples.txt'