Index: head/net/libproxy-mozjs/Makefile
===================================================================
--- head/net/libproxy-mozjs/Makefile	(revision 566608)
+++ head/net/libproxy-mozjs/Makefile	(revision 566609)
@@ -1,20 +1,24 @@
 # Created by: Joe Marcus Clarke <marcus@FreeBSD.org>
 # $FreeBSD$
 
 PORTREVISION=	4
 CATEGORIES=	net www
 PKGNAMESUFFIX=	-${LIBPROXY_SLAVE}
 
 
 COMMENT=	Mozilla JavaScript plug-in for libproxy
 
 USES=		compiler:c++11-lib
 USE_CXXSTD=	gnu++11
 LIB_DEPENDS=	libmozjs-52.so:lang/spidermonkey52
 
 EXTRA_PATCHES=	${FILESDIR}/libproxy-0.4.15-mozjs52.patch:-p1
 
 LIBPROXY_SLAVE=	mozjs
 MASTERDIR=	${.CURDIR}/../libproxy
 
+# See https://github.com/libproxy/libproxy/commit/2203f710988eaa3061e75b083296944e34e17d59
+DEPRECATED=	Discouraged by upstream, will be marked broken in next update
+EXPIRATION_DATE=	2021-03-31
+
 .include "${MASTERDIR}/Makefile"