pi@raspberrypi:~ $ mkdir muddev
pi@raspberrypi:~ $ ls
Desktop    Downloads  muddev  perl5     Public     Videos
Documents  MagPi      Music   Pictures  Templates
pi@raspberrypi:~ $ cd muddev
pi@raspberrypi:~/muddev $ ls
pi@raspberrypi:~/muddev $ virtualenv never
New python executable in /home/pi/muddev/never/bin/python
Installing setuptools, pip, wheel...
done.
pi@raspberrypi:~/muddev $ source never.bin/activate
-bash: never.bin/activate: No such file or directory
pi@raspberrypi:~/muddev $ git clone https://github.com/evennia/evennia.git
Cloning into 'evennia'...
remote: Enumerating objects: 40778, done.
remote: Total 40778 (delta 0), reused 0 (delta 0), pack-reused 40778
Receiving objects: 100% (40778/40778), 34.55 MiB | 4.96 MiB/s, done.
Resolving deltas: 100% (30533/30533), done.
pi@raspberrypi:~/muddev $ pip install -e evennia
Traceback (most recent call last):
  File "/usr/bin/pip", line 9, in <module>
    from pip import main
ImportError: cannot import name main
pi@raspberrypi:~/muddev $ ls
evennia  never