2014-09-23 15:22:45 ERROR Graph creation failed: Problem with serialise-artifact: Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/cliapp/app.py", line 190, in _run
    self.process_args(args)
  File "/usr/lib/python2.7/site-packages/morphlib/app.py", line 267, in process_args
    cliapp.Application.process_args(self, args)
  File "/usr/lib/python2.7/site-packages/cliapp/app.py", line 539, in process_args
    method(args[1:])
  File "/usr/lib/python2.7/site-packages/morphlib/plugins/distbuild_plugin.py", line 66, in serialise_artifact
    self.app.output.write(distbuild.serialise_artifact(artifact))
  File "/usr/lib/python2.7/site-packages/distbuild/serialise.py", line 93, in serialise_artifact
    for a in traverse(artifact):
  File "/usr/lib/python2.7/site-packages/distbuild/serialise.py", line 81, in traverse
    for dep in a.dependencies:
AttributeError: 'Artifact' object has no attribute 'dependencies'