Index: head/math/ruby-algebra/Makefile
===================================================================
--- head/math/ruby-algebra/Makefile	(revision 429664)
+++ head/math/ruby-algebra/Makefile	(revision 429665)
@@ -1,27 +1,30 @@
 # Created by: Akinori MUSHA aka knu <knu@idaemons.org>
 # $FreeBSD$
 
 PORTNAME=	algebra
 PORTVERSION=	0.72
 CATEGORIES=	math ruby
 MASTER_SITES=	http://blade.nagaokaut.ac.jp/~sinara/ruby/math/algebra/
 PKGNAMEPREFIX=	${RUBY_PKGNAMEPREFIX}
 DIST_SUBDIR=	ruby
 
 MAINTAINER=	ruby@FreeBSD.org
 COMMENT=	Ruby library for mathematical (algebraic) computations
 
 OPTIONS_DEFINE=	DOCS EXAMPLES
 
 NO_ARCH=	yes
 NO_BUILD=	yes
 USE_RUBY=	yes
 
+DEPRECATED=	Use rubygem-algebra instead
+EXPIRATION_DATE=	2017-01-28
+
 do-install:
 	@${MKDIR} ${STAGEDIR}${RUBY_MODDOCDIR}/ja/
 	cd ${WRKSRC}/doc/ && ${INSTALL_DATA} *.html *.rd ${STAGEDIR}${RUBY_MODDOCDIR}/
 	cd ${WRKSRC}/doc-ja/ && ${INSTALL_DATA} *.html *.rd ${STAGEDIR}${RUBY_MODDOCDIR}/ja/
 	@${MKDIR} ${STAGEDIR}${RUBY_MODEXAMPLESDIR}/
 	${INSTALL_DATA} ${WRKSRC}/sample/sample-* ${STAGEDIR}${RUBY_MODEXAMPLESDIR}/
 
 .include <bsd.port.mk>