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:
+
+https://pip.pypa.io/en/stable/installing/
+
+
4. Optionally run a regression test on the code with `make check`.
5. Run `./advent` to play.