Index: head/math/py-gmpy2/Makefile
===================================================================
--- head/math/py-gmpy2/Makefile	(revision 535721)
+++ head/math/py-gmpy2/Makefile	(revision 535722)
@@ -1,26 +1,28 @@
 # Created by: Yuri Victorovich <yuri@rawbw.com>
 # $FreeBSD$
 
 PORTNAME=	gmpy2
 PORTVERSION=	2.0.8
 PORTREVISION=	3
 CATEGORIES=	math python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	GMP/MPIR, MPFR, and MPC interface to Python
 
 LICENSE=	GPLv3
 
 LIB_DEPENDS=	libgmp.so:math/gmp \
 		libmpc.so:math/mpc \
 		libmpfr.so:math/mpfr
 
 USES=		python zip
 USE_PYTHON=	distutils autoplist
 
+CONFLICTS=	${PYTHON_PKGNAMEPREFIX}gmpy2-devel-2.1*
+
 post-install:
 	@${STRIP_CMD} ${STAGEDIR}${PYTHON_SITELIBDIR}/gmpy2.so
 
 .include <bsd.port.mk>