diff --git a/security/nacl/Makefile b/security/nacl/Makefile
--- a/security/nacl/Makefile
+++ b/security/nacl/Makefile
@@ -11,6 +11,9 @@
 
 LICENSE=	PD
 
+DEPRECATED=	Unmaintained by upstream, use libsodium instead
+EXPIRATION_DATE=2021-12-31
+
 USES=		tar:bzip2
 USE_BINUTILS=	yes
 MAKE_JOBS_UNSAFE=	yes