Editing from some OS X machines against https://nightly.nuxeo.com/nuxeo/ broken because of URLError

Traceback (most recent call last):
  File "nxdrive/gui/application.pyc", line 680, in event
  File "nxdrive/controller.pyc", line 1054, in locally_edit
  File "nxdrive/client/remote_document_client.pyc", line 424, in add_to_locally_edited_collection
  File "nxdrive/client/base_automation_client.pyc", line 320, in execute
  File "urllib2.pyc", line 404, in open
  File "urllib2.pyc", line 422, in _open
  File "urllib2.pyc", line 382, in _call_chain
  File "urllib2.pyc", line 1222, in https_open
  File "urllib2.pyc", line 1184, in do_open
URLError: <urlopen error [Errno 4] Interrupted system call>