Install doesn't work

[bhourahine]

Describe the bug

The cmake install copies over the binary components, then takes a very long time to eventually complete, but without copying the Python components into the install.

To Reproduce

cmake -DCMAKE_INSTALL_PREFIX=$HOME/.local/ ..
popd
cmake --install _build

Expected behaviour

Local install of Python components into

~/.local/lib/python3.10/site-packages/

Additional context

Ubuntu 22.04 and current main