diff --git a/lang/io-devel/Makefile b/lang/io-devel/Makefile
index b70986c1e250..aa1c40e6b4cd 100644
--- a/lang/io-devel/Makefile
+++ b/lang/io-devel/Makefile
@@ -1,41 +1,44 @@
 PORTNAME=	io
 PORTVERSION=	20240207
-PORTREVISION=	2
+PORTREVISION=	3
 CATEGORIES=	lang
 PKGNAMESUFFIX=	-devel
 
-MAINTAINER=	gahr@FreeBSD.org
+MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Small prototype-based programming language (devel version)
 WWW=		https://iolanguage.org/
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
+DEPRECATED=	Umaintained downstream, does not build with CMake 4
+EXPIRATION_DATE=2026-11-30
+
 CONFLICTS=	io
 
 USES=		cmake:noninja compiler:c11
 
 USE_LDCONFIG=	yes
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	IoLanguage
 GH_TAGNAME=	7113659c4342e98e9a86482b25441775fa066a96
 
 GH_TUPLE+=	kgabis:parson:4f3eaa6:parson/deps/parson
 
 MAKE_JOBS_UNSAFE=	yes
 
 CMAKE_ARGS=	-DWITHOUT_EERIE:BOOL=ON
 
 .include <bsd.port.pre.mk>
 
 # disable SSE on non-x86 archs
 .if ${ARCH} != amd64 && ${ARCH} != i386
 EXTRA_PATCHES+= ${PATCHDIR}/extra-patch-CMakeLists.txt
 .endif
 
 do-test:
 	cd ${BUILD_WRKSRC} && \
 	    ./_build/binaries/io ${WRKSRC}/libs/iovm/tests/correctness/run.io
 
 .include <bsd.port.post.mk>
diff --git a/lang/io/Makefile b/lang/io/Makefile
index 4d9aa773b32f..0467d9e4a398 100644
--- a/lang/io/Makefile
+++ b/lang/io/Makefile
@@ -1,68 +1,70 @@
 PORTNAME=	io
 PORTVERSION=	2017.09.06
-PORTREVISION=	12
+PORTREVISION=	13
 CATEGORIES=	lang
 
-MAINTAINER=	gahr@FreeBSD.org
+MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Small prototype-based programming language
 WWW=		https://iolanguage.org
 
 LICENSE=	BSD3CLAUSE
 
 BROKEN_armv6=		fails to compile: ucontext.h: expected parameter declarator
 BROKEN_armv7=		fails to compile: Coro.c:392:2: no member named 'arm_r0' in 'mcontext_t'
+DEPRECATED=		Umaintained downstream, does not build with CMake 4
+EXPIRATION_DATE=	2026-11-30
 
 CONFLICTS=	io-devel
 
 USES=		cmake:noninja compiler:c11 ssl
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	stevedekorte
 
 MAKE_JOBS_UNSAFE=yes
 USE_LDCONFIG=	yes
 
 PORTDOCS=	*
 PORTEXAMPLES=	*
 
 OPTIONS_DEFINE=	DOCS EXAMPLES
 OPTIONS_GROUP=	ADDONS
 OPTIONS_SUB=	yes
 
 .include "${.CURDIR}/Makefile.addons"
 
 .include <bsd.port.pre.mk>
 
 # disable SSE on non-x86 archs
 .if ${ARCH} != amd64 && ${ARCH} != i386
 EXTRA_PATCHES+=		${PATCHDIR}/extra-patch-CMakeLists.txt
 .endif
 
 post-patch:
 	${REINPLACE_CMD} -e 's/^[ ]*add_subdirectory/#&/' \
 		${WRKSRC}/addons/CMakeLists.txt
 	${RM} ${WRKSRC}/modules/FindFreetype.cmake
 .for addon in ${ADDONS}
 	${ECHO} "add_subdirectory(${addon})" >> ${WRKSRC}/addons/CMakeLists.txt
 .endfor
 	${FIND} ${WRKSRC}/addons -name "*.bak" -o -name "*.orig" -delete
 
 post-install:
 	${FIND} -d ${STAGEDIR}${PREFIX}/lib/io/addons -type d -empty -delete
 	${FIND} ${STAGEDIR}${PREFIX}/lib/io/addons -type f -name "*.so" -exec \
 		${STRIP_CMD} {} \;
 	${MKDIR}  ${STAGEDIR}${DOCSDIR}
 	cd ${WRKSRC}/docs && ${COPYTREE_SHARE} . ${STAGEDIR}${DOCSDIR}
 	${MKDIR}  ${STAGEDIR}${EXAMPLESDIR}
 	cd ${WRKSRC}/samples && ${COPYTREE_SHARE} . ${STAGEDIR}${EXAMPLESDIR}
 	${MKDIR} ${STAGEDIR}${DATADIR}/SyntaxHighlighters
 .for syn in "Emacs IntelliJ JEdit Kate Scintilla Vim"
 	cd ${WRKSRC}/extras/SyntaxHighlighters && \
 	    ${COPYTREE_SHARE} ${syn} ${STAGEDIR}${DATADIR}/SyntaxHighlighters
 .endfor
 
 do-test:
 	cd ${BUILD_WRKSRC} && \
 	    ./_build/binaries/io ${WRKSRC}/libs/iovm/tests/correctness/run.io
 
 .include <bsd.port.post.mk>