TL;DR: pip install is on the way out. Installing Python packages must be done via APT, aka. Kali Linux’s package manager. Python packages coming from other sources should be installed in virtual environments. Long story below. Some background Back in February this year, for a few days, some of you might have tried (and failed) to install Python packages with Pip, aka. Python’s package manager. Suddenly it didn’t work anymore, and it gave this error message instead:
