Why is Spyder using libraries from base environment instead of virtual environment

I created and activated a virtual environment with virtualenv:

virtualenv venv
source venv/bin/activate

Then I installed spyder kernels and other libraries in the virtual environment:

pip install spyder-kernels==0.*
pip install numba==0.50

Then I launched Spyder in the virtual environment:

spyder

And I changed the python interpreter in Spyder to the correct path using: > Python > Preferences > Python interpreter > Use the following Python interpreter

My Python interpreter in my virtual environment is

/Users/myname/venv/bin/python

However, when I import libraries in Spyder, rather than the libraries installed in the virtual environment, Spyder uses the libraries from the base Anaconda environment.

import numba
print(numba.__version__)
0.38.0
print(numba.__file__)
/anaconda3/lib/python3.6/site-packages/numba/__init__.py

This is causing all kinds of errors in my code. What can I do to force Spyder to only use libraries installed in my virtual environment?

[jafetgado]

I upgraded Anaconda Navigator to the most recent version, which came with Spyder 4.0.1 and Python 3.7.6. That alone solved the problem for me. Thank you.

[ccordoba12]

That’s very old. Please update at least to 3.3.6 and try again.