From the build:
> Package ‘python-2.7.18.6’ in
> /nix/store/n5hj62lgkwvz3gqnp4l4nxzjnadh7y54-source/pkgs/development/interpreters/python/cpython/2.7/default.nix:330
> is marked as insecure, refusing to evaluate.
and
> Python 2.7 has reached its end of life after 2020-01-01. See
> https://www.python.org/doc/sunset-python-2/.
Necessary to bump nixpkgs
<https://github.com/nix-community/poetry2nix/pull/996>.