From 7bcbb5cbc893e97109c15cba3ea561aa0d462148 Mon Sep 17 00:00:00 2001
From: "Jason R. Coombs" <jaraco@jaraco.com>
Date: Tue, 23 Dec 2014 10:29:02 -0500
Subject: Force list type for easy concatenation.

---
 setuptools/command/build_ext.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/setuptools/command/build_ext.py b/setuptools/command/build_ext.py
index f0913115..e4b2c593 100644
--- a/setuptools/command/build_ext.py
+++ b/setuptools/command/build_ext.py
@@ -208,7 +208,7 @@ class build_ext(_build_ext):
         )
         # pair each base with the extension
         pairs = itertools.product(ns_ext_bases, self.__get_output_extensions())
-        return (base + fnext for base, fnext in pairs)
+        return list(base + fnext for base, fnext in pairs)
 
     def __get_output_extensions(self):
         yield '.py'
-- 
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