Index: head/science/PETSc/Makefile
===================================================================
--- head/science/PETSc/Makefile	(revision 461772)
+++ head/science/PETSc/Makefile	(revision 461773)
@@ -1,39 +1,39 @@
 # Created by: Thierry Thomas <thierry@pompo.net>
 # $FreeBSD$
 
 PORTNAME=	PETSc
 DISTVERSION=	3.8.3
 CATEGORIES=	science devel
 MASTER_SITES=	http://ftp.mcs.anl.gov/pub/petsc/release-snapshots/
 DISTNAME=	${PORTNAME:tl}-${DISTVERSION}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Suite of data structures and routines from Argonne National Laboratory
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 LIB_DEPENDS=	libmpich.so:net/mpich2
 
-USES=		blaslapack fortran gmake python shebangfix
+USES=		blaslapack fortran gmake python:2.7 shebangfix
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--with-shared-libraries=1 \
 		--with-mpi-dir=${LOCALBASE} \
 		CFLAGS="${CFLAGS} -msse2" CXXFLAGS="${CXXFLAGS} -msse2" CPPFLAGS="${CPPFLAGS}" \
 		LDFLAGS="${LDFLAGS}" LIBS=""
 USE_XORG=	x11
 MAKEFILE=	makefile
 SHEBANG_FILES=	bin/*.py bin/popup bin/saws/SAWs.py bin/saws/*.bash bin/sendToJenkins
 USE_LDCONFIG=	yes
 BINARY_ALIAS=	python=${PYTHON_CMD}
 
 DATADIR=	${PREFIX}/share/${PORTNAME:tl}
 PLIST_SUB=	SHLIB=${DISTVERSION} SHL=${DISTVERSION:C/\.[0-9]$//}
 
 post-install:
 	@${STRIP_CMD} ${STAGEDIR}${PREFIX}/lib/libpetsc.so.${DISTVERSION}
 	@${FIND} ${STAGEDIR}${PREFIX} \( -name "*.html" -o -name "*.mod" \) -delete
 	@cd ${STAGEDIR}${PREFIX} && ${RM} -r bin/win32fe bin/uncrustify.cfg lib/petsc
 	@${RM} -r ${STAGEDIR}${DATADIR}/examples # examples are a mess as installed
 
 .include <bsd.port.mk>