Traceback (most recent call last):
  File "/usr/bin/charm-build", line 9, in <module>
    load_entry_point('charm-tools==2.1.8', 'console_scripts', 'charm-build')()
  File "/usr/lib/python2.7/dist-packages/charmtools/build/builder.py", line 676, in main
    build()
  File "/usr/lib/python2.7/dist-packages/charmtools/build/builder.py", line 519, in __call__
    self.generate()
  File "/usr/lib/python2.7/dist-packages/charmtools/build/builder.py", line 469, in generate
    layers = self.fetch()
  File "/usr/lib/python2.7/dist-packages/charmtools/build/builder.py", line 250, in fetch
    return self.fetch_deps(self.top_layer)
  File "/usr/lib/python2.7/dist-packages/charmtools/build/builder.py", line 254, in fetch_deps
    self.fetch_dep(layer, results)
  File "/usr/lib/python2.7/dist-packages/charmtools/build/builder.py", line 288, in fetch_dep
    base_layer.fetch()
  File "/usr/lib/python2.7/dist-packages/charmtools/build/builder.py", line 99, in fetch
    self._name = self.config.name
  File "/usr/lib/python2.7/dist-packages/charmtools/build/builder.py", line 43, in config
    self._config.configure(self.config_file)
  File "/usr/lib/python2.7/dist-packages/charmtools/build/config.py", line 59, in configure
    except yaml.parser.ParserError:
AttributeError: 'module' object has no attribute 'parser'