Kindly don't shoot the messenger(i.e. me) but pipenv does the work of pip + virtualenv + requirements.txt so packaging tool seems like a good name for it. Virtual environments aren't a lot of fun without local packages and reproducibility I assume.
I'm not easy to hold grudges, but such a critical low-level tool manages to break for what I see as one of the most likely server environments to run on... I hold off on converting the (annoying, but working) virtualenv(wrapper) stuff. Just not worth it, now that I spent weeks of my life handling the annoyance that is python packaging and deployment.