Update to python 3.8 gives error with venv

[jonokoi 0]

I installed buster (5.10.21-sunxi) on an Orange Pi zero.

I'm trying to install a package using a python venv which required python 3.8 but buster comes with python 3.7.

I tried to update using this set of commands

sudo wget https://www.python.org/ftp/python/3.8.2/Python-3.8.2.tgz
sudo tar xzf Python-3.8.2.tgz
cd Python-3.8.2
./configure --enable-optimizations
make -j 4
sudo make altinstall

I tried to create a virtual environment with 

python3.8 -m venv /srv/myapp

but I get this error

Error: Command '['/srv/myapp/bin/python3.8', '-Im', 'ensurepip', '--upgrade', '--default-pip']' returned non-zero exit status 1.

 

What does it mean? How could I fix this?

[lanefu 346]

try out using `pyenv` for installing different versions