Allowing for creation of pre-compiled gems, using rack-compiler-dock.
diff --git a/.gitignore b/.gitignore
index cc70659..64dc26c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -56,7 +56,7 @@
 .ycm_extra_conf.py
 
 # XCode
-build/
+^build/
 *.pbxuser
 !default.pbxuser
 *.mode1v3