An installation problem

Whenever I try to install the library with `pip` or from source (having no other dependencies installed, plain docker container), the process is not successful because it can't resolve requirements for many packages, like `numpy`.

What to do?

Reproduce the installation in a plain Docker container using both pip and the source-install path, recording the complete dependency-resolution error. Start by inspecting the package's declared requirements and the resolver output, especially the numpy-related failure. Done means a fresh container can install the library successfully without manually preinstalling dependencies.

Written by the indexing model from the issue text.