unable to locate package python3-virtualenv

[arch-user-france1]

It seems that it cannot install python3-virutalenv because it doesn't exist (raspberry pi docker image).
It is in the Ubuntu repository though.

I added RUN apt search virtualenv into the dockerfile, seems that python-virtualenv should be used instead?

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dh-virtualenv/trusty 0.6-1 all
  wrap and build python packages using virtualenv

python-tox/trusty-updates 1.6.0-1ubuntu1 all
  virtualenv-based automation of test activities

python-virtualenv/trusty-updates 1.11.4-1ubuntu1 all
  Python virtual environment creator

virtualenv-clone/trusty 0.2.4-1 all
  script for cloning a non-relocatable virtualenv

virtualenvwrapper/trusty 4.1.1-1 all
  extension to virtualenv for managing multiple virtual Python environments

I fixed the install_deb_packages but now it aborted instead of installing the files (like it'd press n instead of y)
This was because I had a separate command and adding -y fixed that.

The pip injstallation script is completely messed up, too.

1. It uses python3.4
2. The wrong get-pip script is downloaded.