Description:

$ pip show zipp | grep Version
Version: 0.0.0

The version should be 2.0.0. As an indirect result, home-assistant is broken:

$ hass
Traceback (most recent call last):
File "/usr/lib/python3.8/site-packages/pkg_resources/__init__.py", line 584, in _build_master
ws.require(__requires__)
File "/usr/lib/python3.8/site-packages/pkg_resources/__init__.py", line 901, in require
needed = self.resolve(parse_requirements(requirements))
File "/usr/lib/python3.8/site-packages/pkg_resources/__init__.py", line 792, in resolve
raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (zipp 0.0.0 (/usr/lib/python3.8/site-packages), Requirement.parse('zipp>=0.5'), {'importlib-metadata'})

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/bin/hass", line 6, in <module>
from pkg_resources import load_entry_point
File "/usr/lib/python3.8/site-packages/pkg_resources/__init__.py", line 3253, in <module>
def _initialize_master_working_set():
File "/usr/lib/python3.8/site-packages/pkg_resources/__init__.py", line 3236, in _call_aside
f(*args, **kwargs)
File "/usr/lib/python3.8/site-packages/pkg_resources/__init__.py", line 3265, in _initialize_master_working_set
working_set = WorkingSet._build_master()
File "/usr/lib/python3.8/site-packages/pkg_resources/__init__.py", line 586, in _build_master
return cls._build_from_requirements(__requires__)
File "/usr/lib/python3.8/site-packages/pkg_resources/__init__.py", line 599, in _build_from_requirements
dists = ws.resolve(reqs, Environment())
File "/usr/lib/python3.8/site-packages/pkg_resources/__init__.py", line 787, in resolve
raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'zipp>=0.5' distribution was not found and is required by importlib-metadata

Additional info:
community/home-assistant 0.104.3-1
community/python-importlib-metadata 1.4.0-1
community-testing/python-zipp 2.0.0-1

Steps to reproduce:
See above

----------------------------------

The problem is that toml is not installed during build(), and setuptools-scm is not invoked as pyproject.toml is not handled. See https://github.com/jaraco/zipp/commit/29c497286e9f8e835c68b7b4ddb9ff3635a273dc for more details.

I feel that importlib-metadata should be dropped (https://bugs.archlinux.org/task/64719); otherwise it or related packages will bite us more in the future.