Hassbian install issue

OK - installing homeassistant on hassbian… consistently seeing an error as follows:

Collecting attrs==18.1.0 (from homeassistant)

Using cached https://files.pythonhosted.org/packages/41/59/cedf87e91ed541be7957c501a92102f9cc6363c623a7666d69d51c78ac5b/attrs-18.1.0-py2.py3-none-any.whl
Requirement already satisfied: pip>=8.0.3 in /srv/homeassistant/lib/python3.5/site-packages (from homeassistant)
Collecting astral==1.6.1 (from homeassistant)
Exception:
Traceback (most recent call last):
File “/srv/homeassistant/share/python-wheels/urllib3-1.19.1-py2.py3-none-any.whl/urllib3/connectionpool.py”, line 594, in urlopen
chunked=chunked)
File “/srv/homeassistant/share/python-wheels/urllib3-1.19.1-py2.py3-none-any.whl/urllib3/connectionpool.py”, line 391, in _make_request
six.raise_from(e, None)
File “”, line 2, in raise_from
File “/srv/homeassistant/share/python-wheels/urllib3-1.19.1-py2.py3-none-any.whl/urllib3/connectionpool.py”, line 387, in _make_request
httplib_response = conn.getresponse()
File “/usr/lib/python3.5/http/client.py”, line 1198, in getresponse
response.begin()
File “/usr/lib/python3.5/http/client.py”, line 297, in begin
version, status, reason = self._read_status()
File “/usr/lib/python3.5/http/client.py”, line 266, in _read_status
raise RemoteDisconnected(“Remote end closed connection without”
http.client.RemoteDisconnected: Remote end closed connection without response

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File “/srv/homeassistant/lib/python3.5/site-packages/pip/basecommand.py”, line 215, in main
status = self.run(options, args)
File “/srv/homeassistant/lib/python3.5/site-packages/pip/commands/install.py”, line 353, in run
wb.build(autobuilding=True)
File “/srv/homeassistant/lib/python3.5/site-packages/pip/wheel.py”, line 749, in build
self.requirement_set.prepare_files(self.finder)
File “/srv/homeassistant/lib/python3.5/site-packages/pip/req/req_set.py”, line 380, in prepare_files
ignore_dependencies=self.ignore_dependencies))
File “/srv/homeassistant/lib/python3.5/site-packages/pip/req/req_set.py”, line 554, in _prepare_file
require_hashes
File “/srv/homeassistant/lib/python3.5/site-packages/pip/req/req_install.py”, line 278, in populate_link
self.link = finder.find_requirement(self, upgrade)
File “/srv/homeassistant/lib/python3.5/site-packages/pip/index.py”, line 465, in find_requirement
all_candidates = self.find_all_candidates(req.name)
File “/srv/homeassistant/lib/python3.5/site-packages/pip/index.py”, line 423, in find_all_candidates
for page in self._get_pages(url_locations, project_name):
File “/srv/homeassistant/lib/python3.5/site-packages/pip/index.py”, line 568, in _get_pages
page = self._get_page(location)
File “/srv/homeassistant/lib/python3.5/site-packages/pip/index.py”, line 683, in _get_page
return HTMLPage.get_page(link, session=self.session)
File “/srv/homeassistant/lib/python3.5/site-packages/pip/index.py”, line 792, in get_page
“Cache-Control”: “max-age=600”,
File “/srv/homeassistant/share/python-wheels/requests-2.12.4-py2.py3-none-any.whl/requests/sessions.py”, line 501, in get
return self.request(‘GET’, url, **kwargs)
File “/srv/homeassistant/lib/python3.5/site-packages/pip/download.py”, line 386, in request
return super(PipSession, self).request(method, url, *args, **kwargs)
File “/srv/homeassistant/share/python-wheels/requests-2.12.4-py2.py3-none-any.whl/requests/sessions.py”, line 488, in request
resp = self.send(prep, **send_kwargs)
File “/srv/homeassistant/share/python-wheels/requests-2.12.4-py2.py3-none-any.whl/requests/sessions.py”, line 609, in send
r = adapter.send(request, **kwargs)
File “/srv/homeassistant/share/python-wheels/CacheControl-0.11.7-py2.py3-none-any.whl/cachecontrol/adapter.py”, line 47, in send
resp = super(CacheControlAdapter, self).send(request, **kw)
File “/srv/homeassistant/share/python-wheels/requests-2.12.4-py2.py3-none-any.whl/requests/adapters.py”, line 423, in send
timeout=timeout
File “/srv/homeassistant/share/python-wheels/urllib3-1.19.1-py2.py3-none-any.whl/urllib3/connectionpool.py”, line 643, in urlopen
_stacktrace=sys.exc_info()[2])
File “/srv/homeassistant/share/python-wheels/urllib3-1.19.1-py2.py3-none-any.whl/urllib3/util/retry.py”, line 315, in increment
total -= 1
TypeError: unsupported operand type(s) for -=: ‘Retry’ and ‘int’
Deactivating virtualenv
Enabling Home Assistant service
Disabling the Home Assistant install script
Starting Home Assistant
Checking the installation…

Installation failed…

Any ideas?

Thanks
Al