TXB Not Finding Schema File

The builder tool isn't finding my Platformer SK's schema file for some odd reason. I can see the myschema.txschema file in the game subfolder of PlatformerDemo, but the tool doesn't.

Ok, figured out my problem before I finished typing the post, but I decided I'd leave it in case someone else makes the same mistake.

For some reason, I loaded the csproj file from PlatformerFramework instead of Game. Bad idea.