From: Barry Warsaw <barry@python.org>
Date: Fri, 29 Jan 2016 16:56:43 -0500
Subject: Debian already unbundles things from requests.

Patch-Name: handle-unbundled-requests.patch
---
 src/pip/_vendor/__init__.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/pip/_vendor/__init__.py b/src/pip/_vendor/__init__.py
index 75f2e7d..51b1b56 100644
--- a/src/pip/_vendor/__init__.py
+++ b/src/pip/_vendor/__init__.py
@@ -94,8 +94,12 @@ if DEBUNDLED:
     vendored("requests.packages.urllib3.fields")
     vendored("requests.packages.urllib3.filepost")
     vendored("requests.packages.urllib3.packages")
-    vendored("requests.packages.urllib3.packages.ordered_dict")
-    vendored("requests.packages.urllib3.packages.six")
+    try:
+        vendored("requests.packages.urllib3.packages.ordered_dict")
+        vendored("requests.packages.urllib3.packages.six")
+    except ImportError:
+        # Debian already unbundles these from requests.
+        pass
     vendored("requests.packages.urllib3.packages.ssl_match_hostname")
     vendored("requests.packages.urllib3.packages.ssl_match_hostname."
              "_implementation")
