Since some time the pip module is already installed in blender's python-distro. As I'm using pyzmq in my Urho3D-Blender exporter to have live-preview this is good news.

Urho3D Renderer in the Viewport

Till now I urged the people using the exporter to strictly follow the rules for setting it up. And its actually not only that, you also need to install 2 addons the exporter is depending on. πŸ˜‰

And we all know that reading closely is a though thing to do (and I don't exclude me here). I tried to smooth the process,...well πŸ˜‰

Now I found the solution:

import bpy
import subprocess
pybin =
subprocess.check_call([pybin, '-m', 'pip', 'install', 'your_package'])

....I only need to integrate it in the exporter. And I guess I should pack the dependend libraries (I created those myself) also,....