-If you are using MacPorts on OS X: 'port install py3{5,6}-yaml', as
-appropriate for your Python 3 version.
+3. Build with `make`.
++
+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`