can't install package with conda or pip

[achiappo]

I am trying to install this package in my conda environment (running Python3.7).
I tried both conda install -c esiravegna pycld2, which gives the PackagesNotFoundError ,
and using pip install pycld2, which lead to the

ERROR: Failed building wheel for pycld2 Running setup.py clean for pycld2 Failed to build pycld2
error with tons of rows printed in red before and after it.
(usually when this happens is an indication that I should use conda instead of pip for some reason...)

last, I tried cloning the repo and installing with python setup.py install but this gave me an error ending in
clang: error: linker command failed with exit code 1 (use -v to see invocation) error: command 'g++' failed with exit status 1

so neither approach works
has anyone else faced the same issue?
I'm running on Mac OS 10.15