Index: head/lang/erlang-runtime23/Makefile
===================================================================
--- head/lang/erlang-runtime23/Makefile
+++ head/lang/erlang-runtime23/Makefile
@@ -4,6 +4,7 @@
 PORTNAME=	erlang
 DISTVERSIONPREFIX=	OTP-
 DISTVERSION=	23.0.2
+PORTREVISION=	1
 CATEGORIES=	lang parallel java
 PKGNAMESUFFIX=	-runtime23
 DIST_SUBDIR=	erlang
@@ -33,6 +34,8 @@
 
 ERLANG_LIB=	${PORTNAME}${PORTVERSION:C/\..*//}
 
+PKG_ENV+=       SOURCE_DATE_EPOCH=${TIMESTAMP}
+
 OPTIONS_DEFINE=	CORBA DIRTY DTRACE HIPE JAVA KQUEUE NATIVE ODBC OPENSSL SCTP THREADS WX
 OPTIONS_DEFAULT=CORBA DIRTY DTRACE KQUEUE OPENSSL SCTP THREADS
 OPTIONS_EXCLUDE_powerpc64=	HIPE ${OPTIONS_EXCLUDE_${ARCH}_${OSREL:R}}
@@ -87,6 +90,8 @@
 
 .include <bsd.port.pre.mk>
 
+CONFIGURE_ARGS+=	--disable-saved-compile-time
+
 .if ${OPSYS} == FreeBSD
 CFLAGS+=	-DMAP_NORESERVE=0
 .endif
@@ -156,4 +161,13 @@
 	@cd ${STAGEDIR}${PREFIX}; ${FIND} lib/${ERLANG_LIB}/* ${DATADIR_REL}/* -type f -o -type l \
 		| ${SORT} >> ${TMPPLIST}
 
+post-build:
+	cd ${WRKSRC} ; \
+	TIMESTAMP=`grep TIMESTAMP ${DISTINFO_FILE} | ${SED} -e 's/[^0-9]//g'`; \
+	TS1=`date -r $${TIMESTAMP} +"Date: %d-%b-%Y::%H:%M:%S"` ; \
+	TS2=`date -r $${TIMESTAMP} +"script generated at {%Y,%M,%d} {%H,%M,%S}"` ; \
+	${REINPLACE_CMD} -i '' -e 's|^%%% Date:.*|%%% '"$${TS1}"'|' lib/snmp/include/*.hrl ; \
+	${REINPLACE_CMD} -i '' -e 's|^%% script generated at.*|%% '"$${TS2}"'|' \
+		bin/*.script erts/start_scripts/*.script
+
 .include <bsd.port.post.mk>