+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`
++
+If you still get the error, use the following command to install yaml with pip:
++
+------------------------------------------------
+pip install pyyaml
+------------------------------------------------
++
+Make sure you have `pip` installed on your system. If not, you should
+install it first. See https://pip.pypa.io/en/stable/installing/