The current README doesn't make it clear what prerequisites must be in place to set up a local environment that's able to run the modtools test suite.

I'm going to set up a pipenv based approach for that, but until the dnf binding are pip-installable, we're going to need to use the workaround from https://github.com/kennethreitz/pipenv/issues/626: advising folks to run pipenv run pew toggleglobalsitepackages to make system packages visible.