+
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/
4. Optionally run a regression test on the code with `make check`.