FreeBSD Port: py36-setuptools_scm-3.1.0 Error update

[Alex V. Petrov]

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "setup.py", line 116, in <module>
    setuptools.setup(**arguments)
  File "/usr/local/lib/python2.7/site-packages/setuptools/__init__.py",
line 143, in setup
    return distutils.core.setup(**attrs)
  File "/usr/local/lib/python2.7/distutils/core.py", line 151, in setup
    dist.run_commands()
  File "/usr/local/lib/python2.7/distutils/dist.py", line 953, in
run_commands
    self.run_command(cmd)
  File "/usr/local/lib/python2.7/distutils/dist.py", line 972, in
run_command
    cmd_obj.run()
  File
"/usr/local/lib/python2.7/site-packages/setuptools/command/install.py",
line 61, in run
    return orig.install.run(self)
  File "/usr/local/lib/python2.7/distutils/command/install.py", line
575, in run
    self.run_command(cmd_name)
  File "/usr/local/lib/python2.7/distutils/cmd.py", line 326, in run_command
    self.distribution.run_command(command)
  File "/usr/local/lib/python2.7/distutils/dist.py", line 972, in
run_command
    cmd_obj.run()
  File
"/usr/local/lib/python2.7/site-packages/setuptools/command/install_egg_info.py",
line 34, in run
    self.run_command('egg_info')
  File "/usr/local/lib/python2.7/distutils/cmd.py", line 326, in run_command
    self.distribution.run_command(command)
  File "/usr/local/lib/python2.7/distutils/dist.py", line 972, in
run_command
    cmd_obj.run()
  File
"/usr/local/lib/python2.7/site-packages/setuptools/command/egg_info.py",
line 296, in run
    self.find_sources()
  File
"/usr/local/lib/python2.7/site-packages/setuptools/command/egg_info.py",
line 303, in find_sources
    mm.run()
  File
"/usr/local/lib/python2.7/site-packages/setuptools/command/egg_info.py",
line 534, in run
    self.add_defaults()
  File
"/usr/local/lib/python2.7/site-packages/setuptools/command/egg_info.py",
line 573, in add_defaults
    rcfiles = list(walk_revctrl())
  File
"/usr/local/lib/python2.7/site-packages/setuptools/command/sdist.py",
line 20, in walk_revctrl
    for item in ep.load()(dirname):
  File
"/usr/ports/devel/py-setuptools_scm/work-py27/setuptools_scm-3.1.0/src/setuptools_scm/integration.py",
line 28, in find_files
    command = ep.load()
  File
"/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line
2346, in load
    return self.resolve()
  File
"/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line
2356, in resolve
    raise ImportError(str(exc))
ImportError: 'module' object has no attribute 'FILES_COMMAND'
*** Error code 1

Stop.
make: stopped in /usr/ports/devel/py-setuptools_scm

===>>> make stage failed for devel/py-setuptools_scm at py27
===>>> Aborting update


===>>> You can restart from the point of failure with this command line:
       portmaster <flags> devel/py-setuptools_scm at py27

-- 
-----
Alex.