Install packages from local pypi server

[tobiderifsch]

Is it at all possible to install packages from a custom pypi server address?
I want to install a python package from a pypi server running in my local network. I have added the server's address into the pip.conf of my homeassistant installation and using pip install [package name] works fine on the command line. However addint [package name] to the requirements.txt file in the config/pyscript directory always results in an error" homeassistant.requirements.RequirementsNotFound: Requirements for pyscript not found: ['my_custom_package'].

Is there a way to add my own pypi server to the list of URLs pyscript checks against when finding packages to install?