diff -ruN --exclude=CVS /usr/ports/x11-toolkits/gtk20.orig/Makefile /usr/ports/x11-toolkits/gtk20/Makefile
--- /usr/ports/x11-toolkits/gtk20.orig/Makefile	2010-04-14 09:06:58.000000000 +0200
+++ /usr/ports/x11-toolkits/gtk20/Makefile	2010-04-19 12:30:26.780781940 +0200
@@ -37,7 +37,7 @@
 		${LOCALBASE}/share/icons/hicolor/index.theme:${PORTSDIR}/misc/hicolor-icon-theme
 
 USE_GMAKE=	yes
-USE_PERL5=	yes
+USE_PERL5_BUILD=	yes
 USE_LDCONFIG=	yes
 USE_AUTOTOOLS=	libtool:22
 USE_GNOME=	gnomehack atk pango ltverhack