You have eaten a Mushroom of Clear Mind. You are no longer confused, and you can build the game from source (either from tag 4.2.2 or the master branch on Github, if you're feeling adventurous).
I realize this is a bit late, but Rephial is no longer updating - http://angband.oook.cz/forum/showpost.php?p=152370&postcount...
Most activity is on the forum at oook.cz or the github releases page, though Rephial was once the official source. A new landing page is probably in the works...