Index: head/devel/gecode/Makefile
===================================================================
--- head/devel/gecode/Makefile	(revision 528152)
+++ head/devel/gecode/Makefile	(revision 528153)
@@ -1,36 +1,36 @@
 # Created by: Peter Pentchev <roam@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	gecode
 DISTVERSIONPREFIX=	release-
 DISTVERSION=	6.2.0
 CATEGORIES=	devel math
 
 PATCH_SITES=	https://github.com/${GH_ACCOUNT}/${PORTNAME}/commit/
 PATCHFILES=	f08079c5df271869bc7c0799b3eccc52ca2f4d83.patch:-p1 # https://github.com/Gecode/gecode/pull/51
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Generic Constraint Development Environment
 
 LICENSE=	BSL MIT
 LICENSE_COMB=	multi
 
 NOT_FOR_ARCHS=		aarch64 armv6 armv7 mips mips64
 NOT_FOR_ARCHS_REASON=	needs code written to specify rounding control mechanism in Boost.Numeric.Interval
 
-USES=		bison cmake compiler:c++11-lang
+USES=		bison:alias cmake compiler:c++11-lang
 USE_GITHUB=	yes
 GH_ACCOUNT=	Gecode
 USE_LDCONFIG=	yes
 
 CMAKE_ON=	BUILD_SHARED_LIBS
 
 OPTIONS_DEFINE=	GIST
 OPTIONS_SUB=	yes
 
 GIST_DESC=	Enable gist, graphical and interactive search tool
 GIST_CMAKE_BOOL=	ENABLE_GIST
 GIST_USES=	qt:5
 GIST_USE=	qt=core,gui,printsupport,widgets,qmake_build,buildtools_build
 
 .include <bsd.port.mk>