bug#44541: Blender addon can't find Python libraries

[Sébastien Lerique]

Hi raingloom,

> Reproduce by installing an addon like AnimationNodes. Or just 
> open thescripting REPL and enter 'import numpy'.

I just hit this, and calling blender with 
`--python-use-system-env` works as a workaround. Is this maybe 
expected behaviour?

Sébastien