diff --git a/www/unit-ruby/Makefile b/www/unit-ruby/Makefile
index f4afe176045c..4455996fc9ef 100644
--- a/www/unit-ruby/Makefile
+++ b/www/unit-ruby/Makefile
@@ -1,40 +1,43 @@
 # Created by: Sergey Osokin <osa@FreeBSD.org>
 
 PKGNAMESUFFIX=	-${UNIT_MODNAME}
 PORTREVISION=	1
 
 UNIT_MODNAME=	ruby${RUBY_VER}
 
 COMMENT=	Ruby module for NGINX Unit
 
 RUN_DEPENDS=	rackup:www/rubygem-rack \
 		unitd:www/unit
 
 PLIST_FILES=	libexec/unit/modules/${UNIT_MODNAME}.unit.so
 
 USE_RUBY=	yes
 
+CFLAGS+=	-fdeclspec
+
 USE_RC_SUBR?=	# reset to empty
 
 MASTERDIR=	${.CURDIR}/../unit
 
 post-configure:
 	cd ${CONFIGURE_WRKSRC} && \
 	${SETENV} ${CONFIGURE_ENV} ${CONFIGURE_CMD} ruby \
+		--ruby=ruby${RUBY_VER:S|.||} \
 		--module=${UNIT_MODNAME}
 
 do-build:
 	cd ${CONFIGURE_WRKSRC} && \
 		${SETENV} ${MAKE_ENV} ${MAKE_CMD} ${MAKE_FLAGS} \
 			${MAKEFILE} ${MAKE_ARGS} ${UNIT_MODNAME}
 
 do-install:
 	${MKDIR} ${STAGEDIR}${PREFIX}/libexec/unit/modules/
 	${INSTALL_LIB} ${WRKSRC}/build/${UNIT_MODNAME}.unit.so \
 		${STAGEDIR}${PREFIX}/libexec/unit/modules/
 
 # Overwrite the target in the ${MASTERDIR}/Makefile
 post-install:
 	@${DO_NADA}
 
 .include "${MASTERDIR}/Makefile"