Fastai v1 install issues thread

Most likely this is something on my end, but on Ubuntu 18.04, I’m installing with pip3:

pip3 install torch_nightly -f https://download.pytorch.org/whl/nightly/cu92/torch_nightly.html
pip3 install fastai
pip3 uninstall fastai

Then I download the fastai library:

git clone https://github.com/fastai/fastai
cd fastai
tools/run-after-git-clone
pip3 install -e .[dev]

The weird thing is that after I install fastai from the repo, pip3 gets broken(!):

$ pip3
Traceback (most recent call last):
  File "/usr/bin/pip3", line 9, in <module>
    from pip import main
ImportError: cannot import name 'main'

I have actually fully uninstalled and reinstalled pip3 including all of its packages and confirmed that I can reproduce this on my machine. Anyone else seeing this?