-+
-If make returns the following message:
-+
-------------------------------------------------
-Traceback (most recent call last):
- File "./make_dungeon.py", line 13, in <module>
- import sys, yaml
-ImportError: No module named yaml
-------------------------------------------------
-+
-try editing make_dungeon.py to change `#!/usr/bin/env python` to
-read `#!/usr/bin/env python3`