Can't build html

[twmht]

Can't make the doc html

[autosummary] generating autosummary for: cmake_example.rst, index.rst
Failed to import 'cmake_example': no module named cmake_example
building [mo]: targets for 0 po files that are out of date
building [html]: targets for 0 source files that are out of date
updating environment: 0 added, 1 changed, 0 removed
reading sources... [100%] cmake_example
/home/tumh/cmake_example/docs/cmake_example.rst:1: WARNING: autodoc: failed to import module u'cmake_example'; the following exception was raised:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/sphinx/ext/autodoc.py", line 386, in import_object
    __import__(self.modname)
ImportError: No module named cmake_example
looking for now-outdated files... none found
pickling environment... done
checking consistency... done
preparing documents... done
writing output... [100%] index
/home/tumh/cmake_example/docs/index.rst:6: WARNING: toctree contains reference to document u'cmake_example' that doesn't have a title: no link will be generated
generating indices... genindex
writing additional pages... search
copying static files... WARNING: html_static_path entry u'/home/tumh/cmake_example/docs/_static' does not exist
done
copying extra files... done
dumping search index in English (code: en) ... done
dumping object inventory... done
build succeeded, 3 warnings.

Any idea?