These repositories contain PyPI wheels that are specific to a Linux distribution.
They replace existing PyPI packages, so can only be used as a standalone (--index-url) to install single packages.
You cannot combine this repository with the default PyPI index in the same pip install command.
See https://github.com/pypa/pip/issues/3454.
PYPI_INDEX=https://www.manicstreetpreacher.co.uk/ome-distribution-specific-pypi/ubuntu-18.04/
apt-get update && apt-get install -y python3 python3-pip
python3 -mpip install --index-url $PYPI_INDEX zeroc-ice
python3 -c 'import Ice; print(Ice.stringVersion())'