O-tree on cloud9


Does anyone know how to run an o-tree program on cloud9? When I try to install it I get the error "Your code is running at https://janus-tyche.c9users.io.

Traceback (most recent call last):
File “manage.py”, line 9, in
from otree.management.cli import execute_from_command_line
ImportError: No module named otree.management.cli

Process exited with code: 1"

Why isn’t this installing?