
Traceback (most recent call last):


 "/var/mobile/Containers/Data/Application/650AC656-F238-4658-B7A4-1644B6535B6E/Library/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py", line 257, in <module>

main()


 "/var/mobile/Containers/Data/Application/650AC656-F238-4658-B7A4-1644B6535B6E/Library/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py", line 240, in main

json_out['return_val'] = hook(**hook_input['kwargs'])


 "/var/mobile/Containers/Data/Application/650AC656-F238-4658-B7A4-1644B6535B6E/Library/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py", line 101, in prepare_metadata_for_build_wheel

backend = _build_backend()


 "/var/mobile/Containers/Data/Application/650AC656-F238-4658-B7A4-1644B6535B6E/Library/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py", line 60, in _build_backend

ep = os.environ['PEP517_BUILD_BACKEND']


 "/var/mobile/Containers/Data/Application/650AC656-F238-4658-B7A4-1644B6535B6E/Library/lib/python3.7/os.py", line 680, in __getitem__

raise KeyError(key) from None

KeyError: 'PEP517_BUILD_BACKEND'


Comment: An exception occurred in this state: Traceback (most recent call last):

 "/usr/lib/python2.7/dist-packages/salt/state.py", line 1703, in call
**cdata['kwargs'])

 "/usr/lib/python2.7/dist-packages/salt/loader.py", line 1649, in wrapper
return f(*args, **kwargs)

 "/usr/lib/python2.7/dist-packages/salt/states/saltmod.py", line 624, in wheel
out = __salt__['saltutil.wheel'](name, **kwargs)

 "/usr/lib/python2.7/dist-packages/salt/modules/saltutil.py", line 1067, in wheel
return wclient.cmd(_fun, kwarg=kwargs)

 "/usr/lib/python2.7/dist-packages/salt/wheel/__init__.py", line 124, in cmd
return super(WheelClient, self).cmd(fun, arg, pub_data, kwarg)

 "/usr/lib/python2.7/dist-packages/salt/client/mixins.py", line 231, in cmd
return self.low(fun, low)

 "/usr/lib/python2.7/dist-packages/salt/client/mixins.py", line 369, in low
mminion=self.mminion,

 "/usr/lib/python2.7/dist-packages/salt/utils/job.py", line 31, in store_job
job_cache = opts['master_job_cache']
KeyError: 'master_job_cache'
Started: 11:22:29.335327