ImportError while building sphinx UITK Autopilot docs

This doesn't look right to me, 2 fatal errors:

/tmp/buildd/ubuntu-ui-toolkit-1.2.1433+15.04.20150306bzr1449pkg0vivid275/documentation/autopilot-helpers/index.rst:7: WARNING: Title underline too short.

Welcome to ubuntu-ui-toolkit-autopilot's documentation!
======================================
/tmp/buildd/ubuntu-ui-toolkit-1.2.1433+15.04.20150306bzr1449pkg0vivid275/documentation/autopilot-helpers/ubuntuuitoolkit.rst:7: WARNING: autodoc: failed to import module 'ubuntuuitoolkit'; the following exception was raised:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/sphinx/ext/autodoc.py", line 335, in import_object
    __import__(self.modname)
ImportError: No module named 'ubuntuuitoolkit'
looking for now-outdated files... none found
pickling environment... done
checking consistency... done
preparing documents... done
assembling single document... ubuntuuitoolkit
writing... done
writing additional files...
copying static files... done
copying extra files... done
dumping object inventory... done
build succeeded, 2 warnings.
sphinx-build -b json documentation/autopilot-helpers documentation/autopilot-helpers/_build/json
Making output directory...
Running Sphinx v1.2.3
loading pickled environment... failed: [Errno 2] No such file or directory: '/tmp/buildd/ubuntu-ui-toolkit-1.2.1433+15.04.20150306bzr1449pkg0vivid275/documentation/autopilot-helpers/_build/json/.doctrees/environment.pickle'
building [json]: targets for 2 source files that are out of date
updating environment: 2 added, 0 changed, 0 removed
reading sources... [ 50%] index
reading sources... [100%] ubuntuuitoolkit