Traceback (most recent call last):  File "/usr/local/bin/az", line 4, in <module>   __import__('pkg_resources').run_script('azure-cli==2.13.0', 'az')  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3088, in <module>   @_call_aside  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3072, in _call_aside   f(*args, **kwargs)  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3101, in _initialize_master_working_set   working_set = WorkingSet._build_master()  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 574, in _build_master   ws.require(requires)  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 892, in require   needed = self.resolve(parse_requirements(requirements))  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 778, in resolve   raise DistributionNotFound(req, requirers) pkg_resources.DistributionNotFound: The 'vsts' distribution was not found and is required by azure-functions-devops-build