Index: urllib3-1.5/urllib3/_collections.py
===================================================================
--- urllib3-1.5.orig/urllib3/_collections.py
+++ urllib3-1.5/urllib3/_collections.py
@@ -10,7 +10,10 @@ from threading import Lock
 try: # Python 2.7+
     from collections import OrderedDict
 except ImportError:
-    from .packages.ordered_dict import OrderedDict
+    try: # backport package
+        from ordereddict import OrderedDict
+    except ImportError:
+        from .packages.ordered_dict import OrderedDict
 
 
 __all__ = ['RecentlyUsedContainer']
Index: urllib3-1.5/urllib3/connectionpool.py
===================================================================
--- urllib3-1.5.orig/urllib3/connectionpool.py
+++ urllib3-1.5/urllib3/connectionpool.py
@@ -51,8 +51,14 @@ from .exceptions import (
     TimeoutError,
 )
 
-from .packages.ssl_match_hostname import match_hostname, CertificateError
-from .packages import six
+try:
+    from backports.ssl_match_hostname import match_hostname, CertificateError
+except ImportError:
+    from .packages.ssl_match_hostname import match_hostname, CertificateError
+try:
+    import six
+except ImportError:
+    from .packages import six
 
 
 xrange = six.moves.xrange
Index: urllib3-1.5/urllib3/filepost.py
===================================================================
--- urllib3-1.5.orig/urllib3/filepost.py
+++ urllib3-1.5/urllib3/filepost.py
@@ -10,8 +10,12 @@ import mimetypes
 from uuid import uuid4
 from io import BytesIO
 
-from .packages import six
-from .packages.six import b
+try:
+    import six
+    from six import b
+except ImportError:
+    from .packages import six
+    from .packages.six import b
 
 writer = codecs.lookup('utf-8')[3]
 
Index: urllib3-1.5/urllib3/response.py
===================================================================
--- urllib3-1.5.orig/urllib3/response.py
+++ urllib3-1.5/urllib3/response.py
@@ -11,7 +11,10 @@ import zlib
 from io import BytesIO
 
 from .exceptions import DecodeError
-from .packages.six import string_types as basestring
+try:
+    from six import string_types as basestring
+except ImportError:
+    from .packages.six import string_types as basestring
 
 
 log = logging.getLogger(__name__)
Index: urllib3-1.5/urllib3/util.py
===================================================================
--- urllib3-1.5.orig/urllib3/util.py
+++ urllib3-1.5/urllib3/util.py
@@ -18,7 +18,10 @@ except ImportError: # `poll` doesn't exi
     except ImportError: # `select` doesn't exist on AppEngine.
         select = False
 
-from .packages import six
+try:
+    import six
+except ImporError:
+    from .packages import six
 from .exceptions import LocationParseError
 
 
Index: urllib3-1.5/test/test_collections.py
===================================================================
--- urllib3-1.5.orig/test/test_collections.py
+++ urllib3-1.5/test/test_collections.py
@@ -1,7 +1,10 @@
 import unittest
 
 from urllib3._collections import RecentlyUsedContainer as Container
-from urllib3.packages import six
+try:
+    import six
+except ImportError:
+    from urllib3.packages import six
 xrange = six.moves.xrange
 
 
Index: urllib3-1.5/test/test_connectionpool.py
===================================================================
--- urllib3-1.5.orig/test/test_connectionpool.py
+++ urllib3-1.5/test/test_connectionpool.py
@@ -1,7 +1,10 @@
 import unittest
 
 from urllib3.connectionpool import connection_from_url, HTTPConnectionPool
-from urllib3.packages.ssl_match_hostname import CertificateError
+try:
+    from backports.ssl_match_hostname import CertificateError
+except ImportError:
+    from urllib3.packages.ssl_match_hostname import CertificateError
 from urllib3.exceptions import (
     ClosedPoolError,
     EmptyPoolError,
Index: urllib3-1.5/test/test_filepost.py
===================================================================
--- urllib3-1.5.orig/test/test_filepost.py
+++ urllib3-1.5/test/test_filepost.py
@@ -1,7 +1,10 @@
 import unittest
 
 from urllib3.filepost import encode_multipart_formdata, iter_fields
-from urllib3.packages.six import b, u
+try:
+    from six import b, u
+except ImportError:
+    from urllib3.packages.six import b, u
 
 
 BOUNDARY = '!! test boundary !!'