You must give at least one requirement to install (see "pip help install")
juju-log: INFO: status-set failed: maintenance Installing base resources
Traceback (most recent call last):
  File "/var/lib/juju/agents/unit-yarn-master-0/charm/hooks/install", line 28, in <module>
    common.manage()
  File "/var/lib/juju/agents/unit-yarn-master-0/charm/hooks/common.py", line 44, in manage
    if not bootstrap_resources():
  File "/var/lib/juju/agents/unit-yarn-master-0/charm/hooks/common.py", line 30, in bootstrap_resources
    mirror_url = jujuresources.config_get('resources_mirror')
  File "/usr/local/lib/python2.7/dist-packages/jujuresources/__init__.py", line 28, in config_get
    raw = subprocess.check_output(['config-get', option_name, '--format=yaml'])
  File "/usr/lib/python2.7/subprocess.py", line 566, in check_output
    process = Popen(stdout=PIPE, *popenargs, **kwargs)
  File "/usr/lib/python2.7/subprocess.py", line 710, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1327, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory