Index: head/math/octave-forge-level-set/Makefile
===================================================================
--- head/math/octave-forge-level-set/Makefile	(revision 382628)
+++ head/math/octave-forge-level-set/Makefile	(revision 382629)
@@ -1,28 +1,34 @@
 # Created by: Stephen Montgomery-Smith <stephen@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	octave-forge-level-set
 PORTVERSION=	0.2.0
 CATEGORIES=	math
 
 MAINTAINER=	stephen@FreeBSD.org
 COMMENT=	Octave-forge package ${OCTAVE_PKGNAME}
 
 LICENSE=	GPLv3
 
 ALL_TARGET=	oct
 USES=		compiler:c++0x
 
 # OCTSRC is the name of the directory of the package.
 # It is usually ${OCTAVE_PKGNAME} or ${DISTNAME}.
 OCTSRC=		${OCTAVE_PKGNAME}
 
 WRKSRC=		${WRKDIR}/${OCTSRC}/src
 
 .include "${.CURDIR}/../../Mk/bsd.octave.mk"
 
 post-build:
 	${RM} -f ${WRKSRC}/Makefile ${WRKSRC}/configure
 	cd ${WRKDIR} && ${TAR} cfz ${DISTNAME}.tar.gz ${OCTSRC}
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+.if ${OSVERSION} <= 900000
+BROKEN=		Doesn't build on FreeBSD 9 or older
+.endif
+
+.include <bsd.port.post.mk>