Did you mean to install pipx-in-pipx?
This package has been parked by Matt Bullock to protect you against packages adopting names that might be common mistakes when looking for ours. You probably wanted to install pipx-in-pipx. For more information, see https://pipipxx.readthedocs.io/en/stable/.
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.