introduce the six module and reduce sphinx.util.pycompat implementation. refs #1350.

1 files changed, 1 insertions, 1 deletions

diff --git a/setup.py b/setup.py
index a92c93b45..92c489fbb 100644
--- a/setup.py
+++ b/setup.py
@@ -45,7 +45,7 @@ if sys.version_info < (2, 6) or (3, 0) <= sys.version_info < (3, 2):
     print('ERROR: Sphinx requires at least Python 2.6 or 3.2 to run.')
     sys.exit(1)
 
-requires = ['Pygments>=1.2', 'docutils>=0.10', 'snowballstemmer>=1.1']
+requires = ['six', 'Pygments>=1.2', 'docutils>=0.10', 'snowballstemmer>=1.1']
 
 if (3, 0) <= sys.version_info < (3, 3):
     requires.append('Jinja2>=2.3,<2.7')