Checking the package more now the content here looks okay, just buildrequires/requires do not match.

Based on upstream for run you just need six: https://github.com/hamcrest/PyHamcrest/blob/master/requirements.txt

So the mock/pytest-cov should not be needed on runtime.

For the buildtime you should add six dependency as now it is pulled in by accident and I seem to not be able to find single mention of hypothesis in their github repo.