I am having a trouble to deploy my Django project due to Python version differences, so I want to update its version on AWS (16.04.4).

I currently have a virtual environment with Python 3.5, so I am trying to create the new one with Python 3.6. So far, I did:

$ source oldenv/bin/activate
$ pip freeze > requirements.txt
$ deactivate
$ sudo apt-get install python3.6
$ python3.6 -m venv newenv

And, I got an error:

'-Im', 'ensurepip', '--upgrade', '--default-pip']' returned non-zero exit status 1.

I looked at the similar question, and the bug that 14.04 shipped with a broken pyvenv seemed to be already fixed.

Some answers recommend using without-pip, but I want to recover packages by

$ newenv/bin/pip install -r requirements.txt

So, it does not sound like a good idea. What to do?

1 Answer 1


Not sure why the first approach does not work, but here is a work-around:

$ pip install virtualenv --user
$ virtualenv -p python3.6 newenv
$ newenv/bin/pip install -r requirements.txt

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.