Index: head/math/slepc/Makefile
===================================================================
--- head/math/slepc/Makefile	(revision 474594)
+++ head/math/slepc/Makefile	(revision 474595)
@@ -1,44 +1,44 @@
 # $FreeBSD$
 
 PORTNAME=	slepc
 DISTVERSION=	3.9.2
 CATEGORIES=	math devel
 MASTER_SITES=	http://slepc.upv.es/download/distrib/
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Scalable Library for Eigenvalue Problem Computations
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 LIB_DEPENDS=	libblas.so:math/blas \
 		liblapack.so:math/lapack \
 		libmpich.so:net/mpich2 \
 		libpetsc.so:science/PETSc
 
-USES=		gmake fortran python shebangfix
+USES=		gmake fortran python:2.7 shebangfix
 SHEBANG_FILES=	configure
 MAKEFILE=	makefile
 MAKE_ENV=	PETSC_DIR=${LOCALBASE} PETSC_ARCH="" SLEPC_DIR=${WRKSRC} FREEBSD_STAGEDIR=${STAGEDIR} PYTHON=${PYTHON_CMD}
 USE_XORG=	x11 # not really needed, but is inherited from the PETSc setup
 USE_LDCONFIG=	yes
 
 OS_VER=		${OPSYS:tl}${OSVERSION:C/(.*)...../\\1/}
 
 BINARY_ALIAS=	python=${PYTHON_CMD}
 
 OPTIONS_DEFINE=	EXAMPLES
 
 PORTEXAMPLES=	*
 
 do-configure:
 	@cd ${WRKSRC} && ${SETENV} ${MAKE_ENV} ./configure
 	@${REINPLACE_CMD} -e 's|^SLEPC_DESTDIR *=.*|SLEPC_DESTDIR = ${PREFIX}|' \
 		${WRKSRC}/installed-arch-${OS_VER}-c-debug/lib/slepc/conf/slepcvariables # otherwise it fills a wrong value for some reason
 
 post-install:
 	@${STRIP_CMD} ${STAGEDIR}${PREFIX}/lib/libslepc.so.${PORTVERSION}
 	@${REINPLACE_CMD} -i '' -e 's|#!/usr/bin/env python|#!${PYTHON_CMD}|' \
 		${STAGEDIR}${PREFIX}/lib/slepc/conf/reconfigure-installed-arch-${OS_VER}-c-debug.py
 
 .include <bsd.port.mk>