This. Right here.<p>All these small necessary evils are nothing compared to bigger pains. From the top of my head.<p>I&#x27;d kill to have a Gemfile scheme that&#x27;s actually used by everybody. We could emulate this pretty darn closely with setup.py and requirements.txt (for Gemfile and Gemfile.lock, respectively). But, most of us just don&#x27;t. Tox generally makes matters worse (since it promotes people dropping even more untracked deps in there), even though it&#x27;s a great tools for what it was designed.