sphinx `make html` output

gistfile1.txt

# Sphinx version: 1.1.3
# Python version: 2.7.3
# Docutils version: 0.8.1 release
# Jinja2 version: 2.6
Traceback (most recent call last):
  File "/home/vagrant/.virtualenvs/boardroom/local/lib/python2.7/site-packages/sphinx/cmdline.py", line 189, in main
    app.build(force_all, filenames)
  File "/home/vagrant/.virtualenvs/boardroom/local/lib/python2.7/site-packages/sphinx/application.py", line 204, in build
    self.builder.build_update()
  File "/home/vagrant/.virtualenvs/boardroom/local/lib/python2.7/site-packages/sphinx/builders/__init__.py", line 196, in build_update
    'out of date' % len(to_build))
  File "/home/vagrant/.virtualenvs/boardroom/local/lib/python2.7/site-packages/sphinx/builders/__init__.py", line 252, in build
    self.write(docnames, list(updated_docnames), method)
  File "/home/vagrant/.virtualenvs/boardroom/local/lib/python2.7/site-packages/sphinx/builders/__init__.py", line 291, in write
    doctree = self.env.get_and_resolve_doctree(docname, self)
  File "/home/vagrant/.virtualenvs/boardroom/local/lib/python2.7/site-packages/sphinx/environment.py", line 1230, in get_and_resolve_doctree
    doctree = self.get_doctree(docname)
  File "/home/vagrant/.virtualenvs/boardroom/local/lib/python2.7/site-packages/sphinx/environment.py", line 1213, in get_doctree
    f = open(doctree_filename, 'rb')
IOError: [Errno 2] No such file or directory: '/home/vagrant/boardroom/docs/build/doctrees/index.doctree