old_contents: import sys
  import marshal
  import os.path
  
  
  if not hasattr(sys, 'implementation'):
      raise ImportError('Python 3.3 or newer is required')
  
  PY_TAG     = sys.implementation.cache_tag
  PY_VERSION = sys.hexversion
  
  if PY_TAG is None:
      # Never seen this to be true, but Python documentation
      # mentions that it's possible.
      raise ImportError('cannot load the bundle since module caching is disabled')
  
  __file__ = os.path.join(__path__[0], 'bundle', PY_TAG + '.dgbundle')
  
  try:
      with open(__file__, 'rb') as _fd:
          for _c in marshal.load(_fd):
              eval(_c)
  except IOError:
      raise ImportError('`{}.dgbundle` is inaccessible'.format(PY_TAG))
  except Exception:
      raise ImportError('`{}.dgbundle` is corrupt'.format(PY_TAG))
  
new_contents: import sys
  import marshal
  import os.path
  
  
  if not hasattr(sys, 'implementation'):
      raise ImportError('Python 3.3 or newer is required')
  
  if sys.implementation.cache_tag is None:
      raise ImportError('cannot load the bundle since module caching is disabled')
  
  PY_TAG      = sys.implementation.cache_tag
  PY_VERSION  = sys.hexversion
  BUNDLE_DIR  = os.path.join(__path__[0], 'bundle')
  BUNDLE_FILE = os.path.join(BUNDLE_DIR, PY_TAG + '.dgbundle')
  
  if not os.path.exists(BUNDLE_FILE):
      raise ImportError('unsupported platform: {}'.format(PY_TAG))
  
  with open(BUNDLE_FILE, 'rb') as _fd:
      for _c in marshal.load(_fd):
          eval(_c)
  
  del _c
  del _fd
  
subject: Rewrite the initial bootstrapping mechanism.