--- vapi/config.vapi.orig	2015-04-27 13:44:43 UTC
+++ vapi/config.vapi
@@ -32,6 +32,8 @@ namespace Build
 	public const string VERSION;
 	public const string VERSION_INFO;
 
+	public const string INSTALL_PREFIX;
+
 	public const uint VERSION_MAJOR;
 	public const uint VERSION_MINOR;
 	public const uint VERSION_MICRO;