--- usr/portage/eclass/php5-sapi.eclass	2007-03-26 20:39:36.000000000 +0000
+++ usr/local/portage/eclass/php5-sapi.eclass	2007-05-09 17:30:19.000000000 +0000
@@ -367,7 +367,7 @@
 	enable_extension_with		"ingres"		"ingres"		1
 	enable_extension_with		"interbase"		"firebird"		1
 	# ircg extension not supported on Gentoo at this time
-	enable_extension_with		"kerberos"		"kerberos"		0 "/usr"
+	enable_extension_with		"kerberos"		"kerberos"		0 "`/usr/bin/krb5-config --prefix`"
 	enable_extension_disable	"libxml"		"xml2"			0
 	enable_extension_enable		"mbstring"		"nls"			1
 	enable_extension_with		"mcrypt"		"crypt"			1