diff --git a/.hgignore b/.hgignore
index 0edb24a..8a8dd01 100644
--- a/.hgignore
+++ b/.hgignore
@@ -17,6 +17,7 @@
 /CrazyDebug.*
 /Debug.*
 /Release.*
+^build$
 
 # Files generated by Mac OS X Finder
 (^|/)\.DS_Store$