Not compatible with pyenv>=1.x

[muppetjones]

Just had a headache of a time figuring out why pyenv activate ... was not actually activating a venv. Completely forgot that I'd updated pyenv a bit ago.

Solution

cd $(pyenv root)
git checkout 1.2.27

This project seems largely abandoned, so mainly leaving this here more as a note.

[PierreRust]

I had the same issue, thanks for your note !

actually adding the following to my config.fish solved it, as mentioned in #401 :

pyenv init --path | source

That's for fish but for zsh and bash the workaround should be similar.
This additional line was not necessary when using pyenv <2 and is not mentioned in the documentation,

[native-api]

Please see updated and hopefully clearer Pyenv shell setup instructions in https://github.com/pyenv/pyenv#readme
eval "$(pyenv virtualenv-init -)" should run in an rc file after eval "$(pyenv init -)" as before.

[PierreRust]

Works for me (that's exactly what I already had since stumbling on this), looks good !