'Packages installed from PyPI cannot depend on packages which are not also hosted on PyPI

I want to install the package cc_net, however when I do pip3 install cc_net as shown here I get the following error:

Packages installed from PyPI cannot depend on packages which are not also hosted on PyPI.
cc_net depends on kenlm@ git+https://github.com/kpu/kenlm.git@master

What does this mean?



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