As seen in https://github.com/MirahezeBots/MirahezeBots/pull/380/checks?check_run_id=1609121656, pkg_resources is throwing errors about version conflicts as it seems it thinks 3.10 is 3.1 or similar. This was fixed for PyPA/Pip in https://github.com/pypa/pip/issues/6730 so it installs from pip fine.

Adding log before it gets cleaned up as too old.

2020-12-25T17:42:03.0730305Z Traceback (most recent call last):
2020-12-25T17:42:03.0733282Z   File "/opt/hostedtoolcache/Python/3.10.0-alpha.3/x64/lib/python3.10/site-packages/pkg_resources/__init__.py", line 584, in _build_master
2020-12-25T17:42:03.0736279Z     ws.require(__requires__)
2020-12-25T17:42:03.0737901Z   File "/opt/hostedtoolcache/Python/3.10.0-alpha.3/x64/lib/python3.10/site-packages/pkg_resources/__init__.py", line 901, in require
2020-12-25T17:42:03.0739330Z     needed = self.resolve(parse_requirements(requirements))
2020-12-25T17:42:03.0742242Z   File "/opt/hostedtoolcache/Python/3.10.0-alpha.3/x64/lib/python3.10/site-packages/pkg_resources/__init__.py", line 792, in resolve
2020-12-25T17:42:03.0744366Z     raise VersionConflict(dist, req).with_context(dependent_req)
2020-12-25T17:42:03.0747963Z pkg_resources.ContextualVersionConflict: (geoip2 4.1.0 (/opt/hostedtoolcache/Python/3.10.0-alpha.3/x64/lib/python3.10/site-packages), Requirement.parse('geoip2<3.0'), {'sopel'})
2020-12-25T17:42:03.0754140Z 
2020-12-25T17:42:03.0754883Z During handling of the above exception, another exception occurred:
2020-12-25T17:42:03.0755487Z 
2020-12-25T17:42:03.0756004Z Traceback (most recent call last):
2020-12-25T17:42:03.0757250Z   File "/opt/hostedtoolcache/Python/3.10.0-alpha.3/x64/bin/sopel", line 6, in <module>
2020-12-25T17:42:03.0758216Z     from pkg_resources import load_entry_point
2020-12-25T17:42:03.0759775Z   File "/opt/hostedtoolcache/Python/3.10.0-alpha.3/x64/lib/python3.10/site-packages/pkg_resources/__init__.py", line 3262, in <module>
2020-12-25T17:42:03.0760984Z     def _initialize_master_working_set():
2020-12-25T17:42:03.0762804Z   File "/opt/hostedtoolcache/Python/3.10.0-alpha.3/x64/lib/python3.10/site-packages/pkg_resources/__init__.py", line 3245, in _call_aside
2020-12-25T17:42:03.0763832Z     f(*args, **kwargs)
2020-12-25T17:42:03.0765396Z   File "/opt/hostedtoolcache/Python/3.10.0-alpha.3/x64/lib/python3.10/site-packages/pkg_resources/__init__.py", line 3274, in _initialize_master_working_set
2020-12-25T17:42:03.0766668Z     working_set = WorkingSet._build_master()
2020-12-25T17:42:03.0768222Z   File "/opt/hostedtoolcache/Python/3.10.0-alpha.3/x64/lib/python3.10/site-packages/pkg_resources/__init__.py", line 586, in _build_master
2020-12-25T17:42:03.0769460Z     return cls._build_from_requirements(__requires__)
2020-12-25T17:42:03.0771154Z   File "/opt/hostedtoolcache/Python/3.10.0-alpha.3/x64/lib/python3.10/site-packages/pkg_resources/__init__.py", line 599, in _build_from_requirements
2020-12-25T17:42:03.0772389Z     dists = ws.resolve(reqs, Environment())
2020-12-25T17:42:03.0773911Z   File "/opt/hostedtoolcache/Python/3.10.0-alpha.3/x64/lib/python3.10/site-packages/pkg_resources/__init__.py", line 787, in resolve
2020-12-25T17:42:03.0775227Z     raise DistributionNotFound(req, requirers)
2020-12-25T17:42:03.0776843Z pkg_resources.DistributionNotFound: The 'geoip2<3.0' distribution was not found and is required by sopel
2020-12-25T17:42:03.0924206Z ##[error]Process completed with exit code 1.

Can't seem to reproduce on alpha 5.

https://github.com/MirahezeBots/MirahezeBots/pull/431/checks?check_run_id=1873007567

https://github.com/python/cpython/compare/v3.10.0a3...v3.10.0a5 doesn't load for me so not sure when it was fixed.

setuptools and pip were upgraded in alpha 5 which could have fixed this : https://github.com/python/cpython/commit/4d11ecbb5ed78e6259ee27289c7638aad795f473

Thanks. Very likely!