Index: head/graphics/opennurbs/Makefile
===================================================================
--- head/graphics/opennurbs/Makefile	(revision 502031)
+++ head/graphics/opennurbs/Makefile	(revision 502032)
@@ -1,59 +1,62 @@
 # $FreeBSD$
 
 PORTNAME=	opennurbs
 PORTVERSION=	20130711
 PORTREVISION=	3
 CATEGORIES=	graphics
 MASTER_SITES=	http://files.na.mcneel.com/opennurbs/5.0/2013-07-11/
 DISTNAME=	${PORTNAME}_${PORTVERSION}
 
 MAINTAINER=	fernape@FreeBSD.org
 COMMENT=	Tools to accurately transfer 3-D geometry between applications
 
 LICENSE_FILE=	${WRKSRC}/readme.txt
 
 USES=		iconv:build dos2unix gmake zip
 MAKE_ARGS=	CC="${CC}" CCC="${CXX}"
 
 MAKEFILE=	makefile
 
 OPTIONS_DEFINE=	EXAMPLES
 
 .include <bsd.port.pre.mk>
 
 # In r311275 zlib.h was moved to contrib/zlib/zlib.h from lib/libz/zlib.h
 LIBZ=		${SRC_BASE}/contrib/zlib
 .if !exists(${LIBZ}/zlib.h)
+LIBZ=		${SRC_BASE}/sys/contrib/zlib
+.endif
+.if !exists(${LIBZ}/zlib.h)
 LIBZ:=		${SRC_BASE}/lib/libz
-.  if !exists(${LIBZ}/zlib.h)
+.endif
+.if !exists(${LIBZ}/zlib.h)
 IGNORE=		needs SRC_BASE to compile. Install base system sources and try again
-.  endif
 .endif
 
 .if ${ARCH} != i386
 MAKE_ARGS+=	ON_GNU_OPTIMIZER_FLAGS="-g -fPIC"
 .endif
 
 pre-build:
 	@${RM} -r ${WRKSRC}/zlib
 	${CP} -R ${LIBZ} ${WRKSRC}/zlib
 
 do-install:
 	@${MKDIR} ${STAGEDIR}${PREFIX}/include/openNURBS/zlib
 	${INSTALL_DATA} ${WRKSRC}/libopenNURBS.a ${STAGEDIR}${PREFIX}/lib
 	${INSTALL_DATA} ${WRKSRC}/*.h ${STAGEDIR}${PREFIX}/include/openNURBS
 	${INSTALL_DATA} ${WRKSRC}/zlib/*.h \
 		${STAGEDIR}${PREFIX}/include/openNURBS/zlib
 
 do-install-EXAMPLES-on:
 	@${MKDIR} ${STAGEDIR}${EXAMPLESDIR}
 	${INSTALL_DATA} ${WRKSRC}/examples_linking_pragmas.h \
 		${STAGEDIR}${EXAMPLESDIR}
 	${INSTALL_DATA} ${WRKSRC}/opennurbs.h ${STAGEDIR}${EXAMPLESDIR}
 .for i in brep read roundtrip userdata write
 	@${MKDIR} ${STAGEDIR}${EXAMPLESDIR}/example_${i}
 	${INSTALL_PROGRAM} ${WRKSRC}/example_${i}/example_${i} ${STAGEDIR}${EXAMPLESDIR}/example_${i}
 	cd ${WRKSRC}/example_${i} && ${COPYTREE_SHARE} . ${STAGEDIR}${EXAMPLESDIR}/example_${i} "-name *\.cpp -or -name *\.h"
 .endfor
 
 .include <bsd.port.post.mk>