diff -ruN --exclude=CVS /usr/ports/x11-wm/bbkeys.orig/Makefile /usr/ports/x11-wm/bbkeys/Makefile
--- /usr/ports/x11-wm/bbkeys.orig/Makefile	2009-08-22 02:39:33.000000000 +0200
+++ /usr/ports/x11-wm/bbkeys/Makefile	2010-04-19 14:16:27.308043098 +0200
@@ -15,7 +15,7 @@
 
 BUILD_DEPENDS=	blackbox:${PORTSDIR}/x11-wm/blackbox
 
-USE_PERL5=	yes
+USE_PERL5_BUILD=	yes
 USE_XORG=	x11 xext
 GNU_CONFIGURE=	yes
 CONFIGURE_ENV=	CPPFLAGS="`pkg-config --cflags xft`" \