doc: note dependencies necessary to build docs

Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>

diff --git a/doc/developer/workflow.rst b/doc/developer/workflow.rst
index 1f33a51adc2d3de6dba08fb3a3cfb78b12e80400..e1101fd76af3a9af38e3e0c80fb9577d1a70d1aa 100644 (file)
--- a/doc/developer/workflow.rst
+++ b/doc/developer/workflow.rst
@@ -550,6 +550,11 @@ The documentation is currently incomplete and needs love. If you find a broken
 cross-reference, figure, dead hyperlink, style issue or any other nastiness we
 gladly accept documentation patches.
 
+To build the docs, please ensure you have installed a recent version of
+`Sphinx <http://www.sphinx-doc.org/en/stable/install.html>`_. If you want to
+build LaTeX or PDF docs, you will also need a full LaTeX distribution
+installed.
+
 Code
 ----