diff -rU5 ports.orig/devel/premake4/Makefile ports/devel/premake4/Makefile
--- ports.orig/devel/premake4/Makefile	2012-06-05 15:57:03.000000000 +0300
+++ ports/devel/premake4/Makefile	2012-06-05 16:07:30.000000000 +0300
@@ -30,11 +30,11 @@
 post-patch:
 	${REINPLACE_CMD} -e 's|-ldl||' ${BUILD_WRKSRC}/Premake4.make
 	${REINPLACE_CMD} -e 's|debug|release|' ${WRKSRC}/tests/test
 
 do-install:
-.if !defined(NOPORTDOCS)
+.if ${PORT_OPTIONS:MDOCS}
 	@${MKDIR} ${DOCSDIR}
 	${INSTALL_DATA} ${PORTDOCS:S,^,${WRKSRC}/,} ${DOCSDIR}
 .endif
 	${INSTALL_PROGRAM} ${WRKSRC}/bin/release/premake4 ${PREFIX}/bin
 
diff -rU5 ports.orig/lang/ikarus/Makefile ports/lang/ikarus/Makefile
--- ports.orig/lang/ikarus/Makefile	2012-06-05 15:57:03.000000000 +0300
+++ ports/lang/ikarus/Makefile	2012-06-05 16:11:12.000000000 +0300
@@ -17,23 +17,28 @@
 MAINTAINER=	vmagerya@gmail.com
 COMMENT=	Optimizing incremental native-code compiler for R6RS Scheme
 
 LIB_DEPENDS=	gmp.10:${PORTSDIR}/math/gmp
 
+# Both install bin/scheme-script
+CONFLICTS=	petite-chez-*
+
 FETCH_ARGS=	-Fpr
 USE_GMAKE=	yes
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS+=\
 		CFLAGS="-I${LOCALBASE}/include" \
 		LDFLAGS="-L${LOCALBASE}/lib"
 
 ONLY_FOR_ARCHS=	i386
+.if defined(PACKAGE_BUILDING)
 NO_PACKAGE=	Pointyhat cluster CPUs do not support required SSE instruction set
+.endif
 
 .include <bsd.port.pre.mk>
 
-.if defined(NOPORTDOCS)
+.if !${PORT_OPTIONS:MDOCS}
 EXTRA_PATCHES+=	${FILESDIR}/extra-patch-Makefile.in \
 		${FILESDIR}/extra-patch-doc__Makefile.in
 .endif
 
 .if ${OSVERSION} < 700042
diff -rU5 ports.orig/lang/petite-chez/Makefile ports/lang/petite-chez/Makefile
--- ports.orig/lang/petite-chez/Makefile	2012-06-05 15:57:03.000000000 +0300
+++ ports/lang/petite-chez/Makefile	2012-06-05 16:07:30.000000000 +0300
@@ -13,10 +13,13 @@
 DISTNAME=	pcsv${PORTVERSION}-${CHEZ_MACHTYPE}
 
 MAINTAINER=	vmagerya@gmail.com
 COMMENT=	Free interpreter for Chez Scheme system
 
+# Both install bin/scheme-script
+CONFLICTS=	ikarus-*
+
 ONLY_FOR_ARCHS=	i386 amd64
 
 NO_PACKAGE=	user must accept license terms before installation
 
 .if defined(PACKAGE_BUILDING)
diff -rU5 ports.orig/lang/stklos/Makefile ports/lang/stklos/Makefile
--- ports.orig/lang/stklos/Makefile	2012-06-05 15:57:03.000000000 +0300
+++ ports/lang/stklos/Makefile	2012-06-05 16:08:25.000000000 +0300
@@ -50,11 +50,11 @@
 		${WRKSRC}/doc/Makefile.in
 	@${REINPLACE_CMD} -e 's|; make|; $$(MAKE)|' \
 		${WRKSRC}/doc/Makefile.in ${WRKSRC}/doc/Makefile.am \
 		${WRKSRC}/lib/Makefile.in ${WRKSRC}/lib/Makefile.am
 
-.if defined(NOPORTDOCS)
+.if !${PORT_OPTIONS:MDOCS}
 	@${REINPLACE_CMD} -E -e 's/^(install-data-am:).*/\1 install-man install-schemeDATA/' \
 		-e '/install-docpdfDATA install-man install-schemeDATA/d' \
 		${WRKSRC}/doc/Makefile.in
 .endif
 
diff -rU5 ports.orig/lang/ypsilon/Makefile ports/lang/ypsilon/Makefile
--- ports.orig/lang/ypsilon/Makefile	2012-06-05 15:57:03.000000000 +0300
+++ ports/lang/ypsilon/Makefile	2012-06-05 16:07:30.000000000 +0300
@@ -21,18 +21,21 @@
 
 MAN1=		ypsilon.1
 
 ONLY_FOR_ARCHS=	i386 amd64
 
-post-patch:
+.include <bsd.port.pre.mk>
 
 do-install:
 	@${INSTALL_PROGRAM} ${WRKSRC}/${PORTNAME} ${PREFIX}/bin
 	@${INSTALL_MAN} ${WRKSRC}/${PORTNAME}.1 ${MANPREFIX}/man/man1
 	@${MKDIR} ${DATADIR}
 	(cd ${WRKSRC}/ && ${COPYTREE_SHARE} "sitelib stdlib" ${DATADIR})
-.ifndef (NOPORTEXAMPLES)
+.if ${PORT_OPTIONS:MEXAMPLES}
 	@${MKDIR} ${EXAMPLESDIR}
 	@${INSTALL_DATA} ${WRKSRC}/example/*.scm ${EXAMPLESDIR}
 .endif
 
-.include <bsd.port.mk>
+regression-test: build
+	cd ${WRKSRC} && ${GMAKE} check
+
+.include <bsd.port.post.mk>