Getting this to work requires a small amount of configuration. On Unix systems
with X11, install the `graphviz <http://www.graphviz.org>`_ toolkit, and make
-sure 'dot' and 'gv' are in your path. If you are running on Mac OS/X, download
-and install the Mac OS/X `Graphviz program
+sure 'dot' and 'gv' are in your path. If you are running on Mac OS X, download
+and install the Mac OS X `Graphviz program
<http://www.pixelglow.com/graphviz/>`_ and add
``/Applications/Graphviz.app/Contents/MacOS/`` (or wherever you install it) to
your path. Once in your system and path are set up, rerun the LLVM configure