> Are you running the latest `tox`? (tox --version == 2.6.0)
Yes
> This is not the first time you've run 'tox', or it would have the 'narrativedocs create' line above. Did you see what happened on the earlier runs? Did they all fail?
Yes, they all failed. I don't have tox output from previous runs. As I remember, the first 'tox -e narrativedocs' run failed because of missing libffi dependency, so this is possible first step one needs to reproduce the problem with running 'narrativedocs inst-nodeps' instead of 'narrativedocs create'.
> Did you copy this development environment from another machine, or move it to a different folder?
No
> Can you try re-creating the virtual environment? Either `tox -r -e narrativedocs` or `rm -fr build/; tox -e narrativedocs`
I tried the `tox -r -e narrativedocs` command and it succeeded! Docs built successfully.
Thank you Glyph for helping :) And thanks to all who responded as well! :)