pip/_vendor/__init__.py | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/pip/_vendor/__init__.py b/pip/_vendor/__init__.py
index b09a7c3..b9fe6ee 100644
--- a/pip/_vendor/__init__.py
+++ b/pip/_vendor/__init__.py
@@ -14,7 +14,7 @@ import sys
 # Downstream redistributors which have debundled our dependencies should also
 # patch this value to be true. This will trigger the additional patching
 # to cause things like "six" to be available as pip.
-DEBUNDLED = False
+DEBUNDLED = True
 
 # By default, look in this directory for a bunch of .whl files which we will
 # add to the beginning of sys.path before attempting to import anything. This
@@ -29,13 +29,10 @@ WHEEL_DIR = os.path.abspath(os.path.dirname(__file__))
 def vendored(modulename):
     vendored_name = "{0}.{1}".format(__name__, modulename)
 
-    try:
-        __import__(vendored_name, globals(), locals(), level=0)
-    except ImportError:
-        __import__(modulename, globals(), locals(), level=0)
-        sys.modules[vendored_name] = sys.modules[modulename]
-        base, head = vendored_name.rsplit(".", 1)
-        setattr(sys.modules[base], head, sys.modules[modulename])
+    __import__(modulename, globals(), locals(), level=0)
+    sys.modules[vendored_name] = sys.modules[modulename]
+    base, head = vendored_name.rsplit(".", 1)
+    setattr(sys.modules[base], head, sys.modules[modulename])
 
 
 # If we're operating in a debundled setup, then we want to go ahead and trigger
@@ -85,8 +82,6 @@ if DEBUNDLED:
     vendored("requests.packages.urllib3.packages.ordered_dict")
     vendored("requests.packages.urllib3.packages.six")
     vendored("requests.packages.urllib3.packages.ssl_match_hostname")
-    vendored("requests.packages.urllib3.packages.ssl_match_hostname."
-             "_implementation")
     vendored("requests.packages.urllib3.poolmanager")
     vendored("requests.packages.urllib3.request")
     vendored("requests.packages.urllib3.response")