--- Makefile.orig	2015-02-23 21:06:00.211824407 +0100
+++ Makefile	2015-02-23 21:11:03.334750588 +0100
@@ -14,5 +14,8 @@
 
 XORG_CAT=	lib
 USE_XORG=	x11 xext xextproto xau printproto:both
+USES+=	cpe
+CPE_PRODUCT=	libxp
+CPE_VENDOR=	x
 
 .include <bsd.port.mk>