--- Makefile.orig	2015-03-09 11:06:14.043937661 +0100
+++ Makefile	2015-03-09 11:06:56.126941956 +0100
@@ -20,10 +20,12 @@
 
 CONFLICTS=	ja-mailman-2.1.*
 
-USES=		python:2 tar:tgz
+USES=		cpe python:2 tar:tgz
 USE_AUTOTOOLS=	autoconf
 USE_RC_SUBR=	mailman
 
+CPE_VENDOR=	gnu
+
 GNU_CONFIGURE_PREFIX=	${MAILMANDIR}
 CONFIGURE_ARGS+=--with-python=${PYTHON_CMD} \
 		--with-username=${MM_USERNAME} \