Traceback (most recent call last):
  File "/opt/freeware/lib/python3.5/site-packages/click-6.7-py3.5.egg/click/testing.py", line 279, in invoke
    prog_name=self.get_default_prog_name(cli), **extra)
  File "/home/code/tlater/build/buildstream/buildstream/_frontend/main.py", line 117, in override_main
    standalone_mode=standalone_mode, **extra)
  File "/opt/freeware/lib/python3.5/site-packages/click-6.7-py3.5.egg/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/opt/freeware/lib/python3.5/site-packages/click-6.7-py3.5.egg/click/core.py", line 1063, in invoke
    Command.invoke(self, ctx)
  File "/opt/freeware/lib/python3.5/site-packages/click-6.7-py3.5.egg/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/opt/freeware/lib/python3.5/site-packages/click-6.7-py3.5.egg/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/opt/freeware/lib/python3.5/site-packages/click-6.7-py3.5.egg/click/decorators.py", line 17, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/home/code/tlater/build/buildstream/buildstream/_frontend/main.py", line 178, in cli
    context.obj = App(dict(kwargs))
  File "/home/code/tlater/build/buildstream/buildstream/_frontend/main.py", line 731, in __init__
    self.is_a_tty = Terminal().is_a_tty
  File "/opt/freeware/lib/python3.5/site-packages/blessings-1.6-py3.5.egg/blessings/__init__.py", line 82, in __init__
    and callable(stream.fileno)
ValueError: underlying buffer has been detached