UnicodeEncodeError when running python-environment-make in Windows

[tkf]

Error:
tkf/emacs-jedi#148 (comment)

Current workaround #9 (add --quiet by default)
(@llcc reported this --quiet fixes the problem: tkf/emacs-jedi#148 (comment))

Of course, it is the best to fix it. It could be a bug in virtualenv or we can do something in Emacs side.

Since I don't have Windows somebody has to do this :-)