Python AttributeError when starting build

[ageis]

  File "/home/homu/venv/bin/homu", line 9, in <module>
    load_entry_point('homu==0.2.0', 'console_scripts', 'homu')()
  File "/home/homu/venv/lib/python3.4/site-packages/homu-0.2.0-py3.4.egg/homu/main.py", line 1638, in main
    queue_handler()
  File "/home/homu/venv/lib/python3.4/site-packages/homu-0.2.0-py3.4.egg/homu/main.py", line 1612, in queue_handler
    return process_queue(states, repos, repo_cfgs, logger, buildbot_slots, db, git_cfg)  # noqa
  File "/home/homu/venv/lib/python3.4/site-packages/homu-0.2.0-py3.4.egg/homu/main.py", line 1233, in process_queue
    logger, db, git_cfg):
  File "/home/homu/venv/lib/python3.4/site-packages/homu-0.2.0-py3.4.egg/homu/main.py", line 1214, in start_build_or_rebuild
    return start_build(state, repo_cfgs, *args)
  File "/home/homu/venv/lib/python3.4/site-packages/homu-0.2.0-py3.4.egg/homu/main.py", line 1070, in start_build
    context = value.get('context')
AttributeError: 'str' object has no attribute 'get'