diff --git a/science/cdf/Makefile b/science/cdf/Makefile
index 38618629fa3f..8eecf6f26783 100644
--- a/science/cdf/Makefile
+++ b/science/cdf/Makefile
@@ -30,6 +30,8 @@ PKGMESSAGE=	${WRKDIR}/pkg-message
 DEFS=		B C K
 PORTDOCS=	CDF_copyright.txt CHANGES.txt Release.notes Welcome.txt
 
+OPTIONS_DEFINE=	DOCS EXAMPLES
+
 .include <bsd.port.pre.mk>
 
 .if ${ARCH} == "ia64" || ${ARCH} == "powerpc" || ${ARCH} == "sparc64"
@@ -45,14 +47,10 @@ pre-configure:
 post-install:
 	${MV} ${STAGEDIR}${PREFIX}/lib/libcdf.so ${STAGEDIR}${PREFIX}/lib/libcdf.so.0
 	${LN} -sf libcdf.so.0 ${STAGEDIR}${PREFIX}/lib/libcdf.so
-.if !defined(NOPORTDOCS)
 	${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${INSTALL_DATA} ${PORTDOCS:S|^|${WRKSRC}/|} ${STAGEDIR}${DOCSDIR}
-.endif
-.if !defined(NOPORTEXAMPLES)
 	${MKDIR} ${STAGEDIR}${EXAMPLESDIR}
 	${INSTALL_DATA} ${WRKSRC}/samples/* ${STAGEDIR}${EXAMPLESDIR}
-.endif
 
 regression-test:
 	(cd ${BUILD_WRKSRC} ;	\
diff --git a/science/chemtool/Makefile b/science/chemtool/Makefile
index cb605962f878..0e5550b72b1d 100644
--- a/science/chemtool/Makefile
+++ b/science/chemtool/Makefile
@@ -19,6 +19,8 @@ CFLAGS+=	-I${LOCALBASE}/include
 LDFLAGS+=	-L${LOCALBASE}/lib
 CONFIGURE_ARGS=	--enable-emf=yes --with-localedir=${PREFIX}
 
+OPTIONS_DEFINE=	EXAMPLES
+
 .include <bsd.port.pre.mk>
 
 #isolate libEMF stuff
@@ -30,10 +32,8 @@ do-install:
 	${INSTALL_PROGRAM} ${WRKSRC}/src-cht/cht ${STAGEDIR}${PREFIX}/bin
 	${INSTALL_MAN} ${WRKSRC}/chemtool.1 ${STAGEDIR}${MANPREFIX}/man/man1
 	${INSTALL_MAN} ${WRKSRC}/cht.1 ${STAGEDIR}${MANPREFIX}/man/man1
-.if !defined(NOPORTEXAMPLES)
 	@${MKDIR} ${STAGEDIR}${EXAMPLESDIR}
 	cd ${WRKSRC}/examples && ${FIND} . | \
 		${CPIO} -pdm -L -R ${SHAREOWN}:${SHAREGRP} ${STAGEDIR}${EXAMPLESDIR}
-.endif
 
 .include <bsd.port.post.mk>
diff --git a/science/colt/Makefile b/science/colt/Makefile
index a8e0e291c85b..2d88d567d086 100644
--- a/science/colt/Makefile
+++ b/science/colt/Makefile
@@ -14,18 +14,24 @@ USE_JAVA=	yes
 JAVA_VERSION=	1.6+
 WRKSRC=		${WRKDIR}/${PORTNAME}
 
-.if !defined(WITHOUT_COMPILE)
+OPTIONS_DEFINE=	DOCS COMPILE
+OPTIONS_DEFAULT=COMPILE
+COMPILE_DESC=	Install the pre-compiled .jar file
+
+.include <bsd.port.options.mk>
+
+.if ${PORT_OPTIONS:MCOMPILE}
 USE_ANT=	yes
 ALL_TARGET=	build
 MAKE_ENV=	LANG=en_US.ISO8859-1
-.if !defined(NOPORTDOCS)
+.if ${PORT_OPTIONS:MDOCS}
 ALL_TARGET+=	javadoc
 .endif
 .else
 NO_BUILD=	yes
 .endif
 
-.if !defined(NOPORTDOCS)
+.if ${PORT_OPTIONS:MDOCS}
 PORTDOCS=	*
 .endif
 
@@ -33,15 +39,8 @@ PLIST_FILES=	%%JAVAJARDIR%%/colt.jar
 
 .include <bsd.port.pre.mk>
 
-pre-fetch:
-	@${ECHO_MSG} ""
-	@${ECHO_MSG} "You may use the following build options:"
-	@${ECHO_MSG} ""
-	@${ECHO_MSG} "    WITHOUT_COMPILE=yes    Install the pre-compiled .jar file"
-	@${ECHO_MSG} ""
-
 do-install:
-.if !defined(NOPORTDOCS)
+.if ${PORT_OPTIONS:MDOCS}
 	@${ECHO_MSG} -n ">> Installing documentation in ${STAGEDIR}${DOCSDIR}..."
 	@cd ${WRKSRC}/doc && ${FIND} . -type d -exec ${MKDIR} ${STAGEDIR}${DOCSDIR}/{} \;
 	@cd ${WRKSRC}/doc && ${FIND} . -type f -exec ${INSTALL_DATA} {} ${STAGEDIR}${DOCSDIR}/{} \;
diff --git a/science/dcl/Makefile b/science/dcl/Makefile
index 161826cf918c..7e9f04e360ba 100644
--- a/science/dcl/Makefile
+++ b/science/dcl/Makefile
@@ -23,16 +23,14 @@ PORTEXAMPLES=	*
 
 RESTRICTED=	No commercial use
 
+OPTIONS_DEFINE=	DOCS EXAMPLES
+
 post-install:
-.if !defined(NOPORTEXAMPLES)
 	@${MKDIR} ${STAGEDIR}${EXAMPLESDIR}
 	(cd ${WRKSRC}/demo/ && ${COPYTREE_SHARE} . ${STAGEDIR}${EXAMPLESDIR})
-.endif
-.if !defined(NOPORTDOCS)
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 .for i in ${PORTDOCS}
 	${INSTALL_DATA} ${WRKSRC}/${i} ${STAGEDIR}${DOCSDIR}/
 .endfor
-.endif
 
 .include <bsd.port.mk>
diff --git a/science/getdp/Makefile b/science/getdp/Makefile
index b1ba29fb826a..71378dcb4dbf 100644
--- a/science/getdp/Makefile
+++ b/science/getdp/Makefile
@@ -28,16 +28,14 @@ MAKE_JOBS_UNSAFE=	yes
 
 WRKSRC=		${WRKDIR}/${PORTNAME}-${PORTVERSION}
 
+OPTIONS_DEFINE=	DOCS EXAMPLES
+
 post-patch:
 	@${REINPLACE_CMD} -e 's/-lgfortran/& $${LDFLAGS}/' ${WRKSRC}/configure
 
 post-install:
-.if !defined(NOPORTDOCS)
 	cd ${WRKSRC}/doc && ${FIND} -s ${WRKSRC}/doc/* | ${SED} -e 's#${WRKSRC}/doc/##' | ${CPIO} -pmud -R ${BINOWN}:${BINGRP} ${STAGEDIR}${DOCSDIR}
-.endif
-.if !defined(NOPORTEXAMPLES)
 	cd ${WRKSRC}/demos && ${FIND} -s ${WRKSRC}/demos/* | ${SED} -e 's#${WRKSRC}/demos/##' | ${CPIO} -pmud -R ${BINOWN}:${BINGRP} ${STAGEDIR}${EXAMPLESDIR}
-.endif
 
 .include <bsd.port.pre.mk>
 
diff --git a/science/gnudatalanguage/Makefile b/science/gnudatalanguage/Makefile
index cc4b86e37c3c..68ee2e8b077a 100644
--- a/science/gnudatalanguage/Makefile
+++ b/science/gnudatalanguage/Makefile
@@ -52,6 +52,8 @@ LDFLAGS+=	${PTHREAD_LIBS} -L${LOCALBASE}/lib
 
 SLAVEDIRS=	science/py-gnudatalanguage
 
+OPTIONS_DEFINE=	EXAMPLES
+
 .if defined(BUILD_PYTHON_MODULE)
 CATEGORIES+=	python
 CMAKE_ARGS+=	-DPYTHON_MODULE:BOOL=YES -DOPENMP:BOOL=NO
@@ -134,10 +136,8 @@ do-install:
 
 .if !defined(BUILD_PYTHON_MODULE)
 post-stage:
-. if !defined(NOPORTEXAMPLES)
 	${MKDIR} ${STAGEDIR}${EXAMPLESDIR}/testsuite
 	(cd ${WRKSRC}/testsuite && ${COPYTREE_SHARE} \* ${STAGEDIR}${EXAMPLESDIR}/testsuite/)
-. endif
 .endif
 
 .if defined(MAINTAINER_MODE)
diff --git a/science/medit/Makefile b/science/medit/Makefile
index 40744d1fe8c2..71019a669e05 100644
--- a/science/medit/Makefile
+++ b/science/medit/Makefile
@@ -34,7 +34,11 @@ LIBTARBALL=	library.${LIBVERSION}${EXTRACT_SUFX}
 
 PLIST_FILES=	bin/${PORTNAME}
 
-. if !defined(NOPORTEXAMPLES)
+OPTIONS_DEFINE=	EXAMPLES
+
+.include <bsd.port.options.mk>
+
+. if ${PORT_OPTIONS:MEXAMPLES} || make(makesum)
 DISTFILES+=	meshes.tar.gz
 EXTRACT_ONLY+=	meshes.tar.gz
 MESHES=		DEFAULT.medit ozark.gis part.bb part.mesh thepart.mesh
@@ -55,7 +59,7 @@ pre-build:
 
 do-install:
 	${INSTALL_PROGRAM} ${WRKSRC}/bin/${PORTNAME} ${STAGEDIR}${PREFIX}/bin
-.if !defined(NOPORTEXAMPLES)
+.if ${PORT_OPTIONS:MEXAMPLES}
 	${MKDIR} ${STAGEDIR}${EXAMPLESDIR}
 	${INSTALL_DATA} ${MESHES:S|^|${WRKSRC}/INRIA.dir/|} ${STAGEDIR}${EXAMPLESDIR}
 .endif
diff --git a/science/ncs/Makefile b/science/ncs/Makefile
index fef22449f8f3..f63789f64d22 100644
--- a/science/ncs/Makefile
+++ b/science/ncs/Makefile
@@ -41,6 +41,10 @@ NEED_ROOT=	yes
 FORTRANLIBDIR=	`${DIRNAME} \\`${FC} -print-libgcc-file-name\\``
 FORTRANLIBDIR2=	`${DIRNAME} \\`${FC} -print-libgcc-file-name\\``/../../../
 
+OPTIONS_DEFINE=	DOCS EXAMPLES
+
+.include <bsd.port.options.mk>
+
 .if defined(PACKAGE_BUILDING)
 TERM=		vt100	# Force for pointyhat to override su
 .else
@@ -70,7 +74,7 @@ RUN_DEPENDS+=	${MPI_HOME}/bin/mpirun:${PORTSDIR}/net/mpich2
 MPI_LIBS=	-lmpich -lmpl ${PTHREAD_LIBS}
 .endif
 
-.if !defined(NOPORTDOCS)
+.if ${PORT_OPTIONS:MDOCS}
 USE_TEX=	tex:build
 BUILD_DEPENDS+=	fig2dev:${PORTSDIR}/print/transfig
 ALL_TARGET=	all pdf
@@ -107,11 +111,11 @@ pre-everything::
 	@${ECHO_MSG}
 
 post-install:
-.if !defined(NOPORTDOCS)
+.if ${PORT_OPTIONS:MDOCS}
 	${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${INSTALL_DATA} ${DOCS:C|^|${WRKSRC}/|} ${STAGEDIR}${DOCSDIR}
 .endif
-.if !defined(NOPORTEXAMPLES)
+.if ${PORT_OPTIONS:MEXAMPLES}
 	${MKDIR} ${STAGEDIR}${EXAMPLESDIR}
 	cd ${WRKSRC}/examples && ${COPYTREE_SHARE} \* ${STAGEDIR}${EXAMPLESDIR}
 .endif
diff --git a/science/ruby-dcl/Makefile b/science/ruby-dcl/Makefile
index c9859cb430f9..388c82be2984 100644
--- a/science/ruby-dcl/Makefile
+++ b/science/ruby-dcl/Makefile
@@ -38,6 +38,8 @@ EXAMPLESDIR=	${RUBY_MODEXAMPLESDIR}
 PORTDOCS=	ChangeLog README ToDo
 PORTEXAMPLES=	*
 
+OPTIONS_DEFINE=	DOCS EXAMPLES
+
 .include <bsd.port.pre.mk>
 
 .if ${ARCH} == "ia64"
@@ -45,15 +47,11 @@ BROKEN=	Does not build on ${ARCH} (Needs to link against shared libraries)
 .endif
 
 post-install:
-.if !defined(NOPORTEXAMPLES)
 	${MKDIR} ${STAGEDIR}${RUBY_MODEXAMPLESDIR}
 	(cd ${WRKSRC}/demo/ && ${COPYTREE_SHARE} \* ${STAGEDIR}${RUBY_MODEXAMPLESDIR})
-.endif
-.if !defined(PORT_OPTIONS:MDOCS)
 	${MKDIR} ${STAGEDIR}${RUBY_MODDOCDIR}
 .for f in ${PORTDOCS}
 	${INSTALL_DATA} ${WRKSRC}/${f} ${STAGEDIR}${RUBY_MODDOCDIR}
 .endfor
-.endif
 
 .include <bsd.port.post.mk>