installing from pypi using pip doesn't pull prereqs

pip install css -> is not sufficient to get css since it does not pull in codetalker package
also doesn't help that codetalker in pypi doesn't compile.

Start by reproducing the reported `pip install css` failure and inspect the package metadata used for the PyPI release. Check how the `codetalker` dependency is declared and whether its PyPI package builds successfully. Done means installing `css` pulls in a usable `codetalker` package without a separate manual dependency step.

Written by the indexing model from the issue text.