Step 37 : RUN cd /tmp/gnocchi; git checkout stable/3.0; python setup.py install
 ---> Running in 7f09eb221273
Already on 'stable/3.0'
Your branch is up-to-date with 'origin/stable/3.0'.
Marker evaluation failed, see the following error.  For more information see: http://docs.openstack.org/developer/pbr/compatibility.html#evaluate-marker
ERROR:root:Error parsing
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/pbr/core.py", line 111, in pbr
    attrs = util.cfg_to_args(path, dist.script_args)
  File "/usr/local/lib/python2.7/dist-packages/pbr/util.py", line 251, in cfg_to_args
    kwargs = setup_cfg_to_setup_kwargs(config, script_args)
  File "/usr/local/lib/python2.7/dist-packages/pbr/util.py", line 434, in setup_cfg_to_setup_kwargs
    if pkg_resources.evaluate_marker('(%s)' % env_marker):
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 1271, in evaluate_marker
    return cls.interpret(parser.expr(text).totuple(1)[1])
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 1306, in interpret
    return op(nodelist)
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 1223, in atom
    return cls.interpret(nodelist[2])
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 1306, in interpret
    return op(nodelist)
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 1241, in comparison
    raise SyntaxError(repr(cop)+" operator not allowed in environment markers")
SyntaxError: '<' operator not allowed in environment markers
error in setup command: Error parsing /tmp/gnocchi/setup.cfg: SyntaxError: '<' operator not allowed in environment markers
The command '/bin/sh -c cd /tmp/gnocchi; git checkout stable/3.0; python setup.py install' returned a non-zero code: 1