diff --git a/x11-toolkits/rubygem-gtk2/Makefile b/x11-toolkits/rubygem-gtk2/Makefile
index 738ee1fdb2c5..bcdb9980b672 100644
--- a/x11-toolkits/rubygem-gtk2/Makefile
+++ b/x11-toolkits/rubygem-gtk2/Makefile
@@ -1,31 +1,21 @@
 PORTNAME=	gtk2
 PORTVERSION=	3.4.3
 PORTREVISION=	2
 CATEGORIES=	x11-toolkits rubygems
 MASTER_SITES=	RG
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Ruby binding of GTK+ 2.x
 WWW=		https://ruby-gnome2.osdn.jp/
 
 LICENSE=	LGPL21+
 LICENSE_FILE=	${WRKSRC}/COPYING.LIB
 
-LIB_DEPENDS=	libharfbuzz.so:print/harfbuzz \
-		libfontconfig.so:x11-fonts/fontconfig \
-		libfreetype.so:print/freetype2
 RUN_DEPENDS=	rubygem-atk>=${PORTVERSION}:accessibility/rubygem-atk \
 		rubygem-gdk_pixbuf2>=${PORTVERSION}:graphics/rubygem-gdk_pixbuf2 \
 		rubygem-pango>=${PORTVERSION}:x11-toolkits/rubygem-pango
 
-USES=		gem gnome xorg
-USE_GNOME=	cairo gdkpixbuf2 gtk20 introspection
-USE_XORG=	x11
-
-.include <bsd.port.options.mk>
-
-.if ${OPSYS} == FreeBSD && ( ${OSVERSION} >= 1400079 || ( ${OSVERSION} >= 1302505 && ${OSVERSION} < 1400000 ))
-CONFIGURE_ARGS+=	--with-cflags="-Wno-error=int-conversion"
-.endif
+USES=		gem gnome
+USE_GNOME=	gtk20
 
 .include <bsd.port.mk>
diff --git a/x11-toolkits/rubygem-gtk2/files/patch-clang15 b/x11-toolkits/rubygem-gtk2/files/patch-clang15
new file mode 100644
index 000000000000..8f2fe28674b0
--- /dev/null
+++ b/x11-toolkits/rubygem-gtk2/files/patch-clang15
@@ -0,0 +1,22 @@
+--- ext/gtk2/rbgdkscreen.c.orig	2023-06-13 15:11:58 UTC
++++ ext/gtk2/rbgdkscreen.c
+@@ -255,7 +255,7 @@ rg_window_stack(VALUE self)
+ static void
+ child_setup(gpointer func)
+ {
+-    if (! NIL_P(func)){
++    if (! NIL_P((VALUE) func)){
+         rb_funcall((VALUE)func, id_call, 0);
+     }
+ }
+--- ext/gtk2/rbgtkdrag.c.orig	2023-06-13 15:21:51 UTC
++++ ext/gtk2/rbgtkdrag.c
+@@ -358,7 +358,7 @@ static VALUE
+ rg_m_source_get_target_list(G_GNUC_UNUSED VALUE self, VALUE widget)
+ {
+     GtkTargetList* ret = gtk_drag_source_get_target_list(RVAL2WIDGET(widget));
+-    return NIL_P(ret) ? Qnil : BOXED2RVAL(ret, GTK_TYPE_TARGET_LIST);
++    return NIL_P((VALUE) ret) ? Qnil : BOXED2RVAL(ret, GTK_TYPE_TARGET_LIST);
+ }
+ 
+ static VALUE