Too many issues will kill our team's development velocity, drastically. Make sure you have checked all steps below.
pyenv-virtualenv
PYENV_DEBUG=1
env PYENV_DEBUG=1 pyenv install -v 3.6.4
# for Bash export PS4='+(${BASH_SOURCE}:${LINENO}): ${FUNCNAME[0]:+${FUNCNAME[0]}(): }' # for Zsh export PS4='+(%x:%I): %N(%i): ' set -x <reproduce the problem> set +x