pip install etsy

$ pip install --user etsy

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 134, in main
    status = self.run(options, args)
  File "/usr/lib/python2.7/dist-packages/pip/commands/install.py", line 236, in run
    requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
  File "/usr/lib/python2.7/dist-packages/pip/req.py", line 1085, in prepare_files
    url = finder.find_requirement(req_to_install, upgrade=self.upgrade)
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 245, in find_requirement
    page_versions.extend(self._package_versions(page.links, req.name.lower()))
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 429, in _package_versions
    for link in self._sort_links(links):
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 419, in _sort_links
    for link in links:
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 784, in links
    url = self.clean_link(urlparse.urljoin(self.base_url, href))
  File "/usr/lib/python2.7/urlparse.py", line 260, in urljoin
    urlparse(url, bscheme, allow_fragments)
  File "/usr/lib/python2.7/urlparse.py", line 142, in urlparse
    tuple = urlsplit(url, scheme, allow_fragments)
  File "/usr/lib/python2.7/urlparse.py", line 190, in urlsplit
    raise ValueError("Invalid IPv6 URL")
ValueError: Invalid IPv6 URL