diff --git a/lang/gnat12/Makefile b/lang/gnat12/Makefile
index 7f6587f1d52c..43af2cbf20fc 100644
--- a/lang/gnat12/Makefile
+++ b/lang/gnat12/Makefile
@@ -1,140 +1,142 @@
 PORTNAME=	gnat12
 PORTVERSION=	12.2.0
 CATEGORIES=	lang
 MASTER_SITES=	${MASTER_SITE_GCC}:gcc	\
 		LOCAL/thierry:gnat
 MASTER_SITE_SUBDIR=releases/gcc-${PORTVERSION}
 DISTFILES=	gcc-${PORTVERSION}.tar.xz:gcc
 
 MAINTAINER=	thierry@FreeBSD.org
 COMMENT=	GNAT Ada compiler
 WWW=		https://www.adacore.com/community
 
 LICENSE=	GPLv2 GPLv3 GPLv3RLE
 LICENSE_COMB=	multi
 
+IGNORE=	does not run without gcc12 built from this port
+
 LIB_DEPENDS=	libgmp.so:math/gmp	\
 		libmpc.so:math/mpc	\
 		libisl.so:devel/isl	\
 		libmpfr.so:math/mpfr
 
 USES=		bison gettext-runtime gmake iconv libtool localbase tar:xz
 USE_BINUTILS=	yes
 BINARY_ALIAS=	make=${GMAKE}
 
 OPTIONS_DEFINE=	ASSETS
 OPTIONS_RADIO=	BOOTSTRAP
 OPTIONS_RADIO_BOOTSTRAP=	GCC6AUX	PREVASSET
 OPTIONS_DEFAULT=GCC6AUX
 .if defined(PACKAGE_BUILDING)
 OPTIONS_DEFAULT+=	ASSETS
 .endif
 OPTIONS_SUB=	yes
 ASSETS_DESC=	Build an asset for future bootstrap on the target platform
 GCC6AUX_DESC=	Bootstrap from lang/gcc6-aux
 PREVASSET_DESC=	Bootstrap from the previous asset (if available)
 
 GCC6AUX_BUILD_DEPENDS=	gcc6-aux>0:lang/gcc6-aux
 PREVASSET_DISTFILES+=	${PREV_ASSET_FILE}.tar.xz:gnat
 
 GCC6AUX_VARS=	PATHAUX=${LOCALBASE}/gcc6-aux/bin
 PREVASSET_VARS=	PATHAUX=${WRKDIR}/${PREV_ASSET_FILE}/bin
 ASSETS_VARS=	PKGMESSAGE=${WRKDIR}/pkg-message
 
 GNU_CONFIGURE=	yes
 CONFIGURE_OUTSOURCE=	yes
 WRKSRC=		${WRKDIR}/gcc-${PORTVERSION}
 FULLPATH=	/sbin:/bin:/usr/sbin:/usr/bin:${PATHAUX}:${PREFIX}/bin:${LOCALBASE}/bin
 TARGLIB=	${PREFIX}/lib/gcc${GCCVER}
 TARGLIB32=	${PREFIX}/lib32
 LIBEXEC=	${PREFIX}/libexec/gcc${GCCVER}
 CONFIGURE_ENV+=	PATH=${FULLPATH}	\
 		CC=${PATHAUX}/gcc	\
 		CXX=${PATHAUX}/g++
 CONFIGURE_ARGS=	--enable-languages="c,ada"	\
 		--with-pkgversion="${OPSYS} Ports Collection"	\
 		--with-gxx-include-dir=${TARGLIB}/include/c++/	\
 		--with-gxx-libcxx-include-dir=/usr/include/c++/v1 \
 		--enable-gnu-indirect-function	\
 		--with-as=${LOCALBASE}/bin/as	\
 		--with-ld=${LOCALBASE}/bin/ld	\
 		--program-suffix=${GCCVER}	\
 		--libexecdir=${LIBEXEC}	\
 		--libdir=${TARGLIB}	\
 		--enable-threads=posix	\
 		--disable-libquadmath	\
 		--enable-host-shared	\
 		--disable-libmudflap	\
 		--with-system-zlib	\
 		--disable-libgomp	\
 		--disable-libssp	\
 		--enable-libada		\
 		--without-zstd
 CONFIGURE_TARGET=	${GARCH}-portbld-${PLATFORM}
 
 MAKE_ENV+=	PATH=${FULLPATH}
 INSTALL_TARGET=	install-strip
 USE_LDCONFIG=	${TARGLIB}
 
 GNATMAKE=	${PATHAUX}/gnatmake
 GNATBING=	${PATHAUX}/gnatbind
 
 GCCVER=		${PORTVERSION:R:R}
 
 PLATFORM=	${OPSYS:tl}${OSREL}
 GARCH=		${ARCH:S/amd64/x86_64/}
 OS_LABEL4VERS=	[${OPSYS}${GARCH:S/amd//:S/x86_//:S/aarch/\/ARM/:S/i386/32/}]
 REVFILE=	${WRKSRC}/gcc/REVISION
 PHASEFILE=	${WRKSRC}/gcc/DEV-PHASE
 ASSET_FILE=	gnat-${GARCH}-${OPSYS:tl}.${OSREL:R}-${PKGVERSION}
 PREV_ASSET_VER?=	${PORTVERSION}
 PREV_ASSET_OSREL?=	${OSREL:R}
 PREV_ASSET_FILE=gnat-${GARCH}-${OPSYS:tl}.${PREV_ASSET_OSREL}-${PREV_ASSET_VER}
 
 PLIST_SUB=	CONFTRGT=${CONFIGURE_TARGET} VER=${PORTVERSION}	\
 		ASSET_FILE=${ASSET_FILE}
 INFO=		gnat-style	\
 		gnat_rm		\
 		gnat_ugn
 
 pre-configure:
 	${ECHO} "-=> GNAT ${OS_LABEL4VERS}" > ${REVFILE}
 	${ECHO} "release" > ${PHASEFILE}
 
 pre-configure-PREVASSET-on:
-	cd ${PATHAUX} ; for f in *${GCCVER} ; do	\
-	${LN} -sf $${f} $${f%${GCCVER}} ;			\
+	cd ${PATHAUX} ; for f in *${PREV_ASSET_VER} ; do	\
+	${LN} -sf $${f} $${f%${PREV_ASSET_VER}} ;			\
 	done
 
 post-install-ASSETS-on:
 	${MKDIR} ${WRKDIR}/${ASSET_FILE} ${STAGEDIR}${DATADIR}/assets
 	${CP} -Rp ${STAGEDIR}${PREFIX}/* ${WRKDIR}/${ASSET_FILE}
 	(cd ${WRKDIR} &&	\
 		${TAR} cfJ ${STAGEDIR}${DATADIR}/assets/${ASSET_FILE}.tar.xz ${ASSET_FILE})
 
 post-stage:
 .for d in "" 32
 .  for l in libgnarl-${GCCVER} libgnat-${GCCVER}
 	${STRIP_CMD}	\
 		${STAGEDIR}${PREFIX}/lib/gcc${GCCVER}/gcc/${CONFIGURE_TARGET}/${PORTVERSION}/${d}/adalib/${l}.so
 .  endfor
 .endfor
 	${CP} -p ${STAGEDIR}${PREFIX}/libexec/gcc${GCCVER}/gcc/${CONFIGURE_TARGET}/${PORTVERSION}/gnat1	\
 		${WRKDIR}
 	# avoid conflict with lang/gcc${GCCVER}
 	${ECHO} "${RM} -rf " > ${WRKDIR}/avoid_conflict.sh
 	${CAT} ${FILESDIR}/avoid_conflict >> ${WRKDIR}/avoid_conflict.sh
 	${SED} -i"" -e 's|$$| \\|;s|%%CONFTRGT%%|${CONFIGURE_TARGET}|;	\
 		s|%%VER%%|${PORTVERSION}|' ${WRKDIR}/avoid_conflict.sh
 	(cd ${STAGEDIR}${PREFIX} && ${SH} ${WRKDIR}/avoid_conflict.sh)
 	${MKDIR} ${STAGEDIR}${PREFIX}/libexec/gcc${GCCVER}/gcc/${CONFIGURE_TARGET}/${PORTVERSION}
 	${MV} ${WRKDIR}/gnat1	\
 		${STAGEDIR}${PREFIX}/libexec/gcc${GCCVER}/gcc/${CONFIGURE_TARGET}/${PORTVERSION}
 
 post-stage-ASSETS-on:
 	@${ECHO_CMD} "The file ${DATADIR}/assets/${ASSET_FILE}.tar.xz has been created"	\
 		> ${PKGMESSAGE}
 	@${ECHO_CMD} "You may want to copy it under ${DISTDIR} to use the option PREVASSET next time."	\
 		>> ${PKGMESSAGE}
 
 .include <bsd.port.mk>