diff --git a/net-mgmt/prometheus2/Makefile b/net-mgmt/prometheus2/Makefile
index 636b85772ef3..e597b9c43582 100644
--- a/net-mgmt/prometheus2/Makefile
+++ b/net-mgmt/prometheus2/Makefile
@@ -1,84 +1,85 @@
 PORTNAME=	prometheus
 DISTVERSIONPREFIX=	v
 DISTVERSION=	2.28.1
 CATEGORIES=	net-mgmt
+PORTREVISION=	1
 
 MAINTAINER=	dor.bsd@xm0.uk
 COMMENT=	Systems monitoring and alerting toolkit
 
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 USES=		gmake go:modules
 
 USE_GITHUB=	yes
 GH_TUPLE=	ports-assets:net-mgmt_prometheus2:${DISTVERSIONFULL}:assets
 USE_RC_SUBR=	prometheus
 
 GO_TARGET=	./cmd/prometheus ./cmd/promtool
 GO_BUILDFLAGS=	-v -ldflags "${LD_FLAG_STRING}" -tags netgo,builtinassets
 
 SUB_LIST+=	PROMETHEUS_CONSOLE_LIBRARIES_DIR=${PROMETHEUS_CONSOLE_LIBRARIES_DIR} \
 		PROMETHEUS_CONSOLES_DIR=${PROMETHEUS_CONSOLES_DIR} \
 		PROMETHEUS_DB_DIR=${PROMETHEUS_DB_DIR} \
 		PROMETHEUS_GROUP=${PROMETHEUS_GROUP} \
 		PROMETHEUS_USER=${PROMETHEUS_USER}
 
 USERS=		${PROMETHEUS_USER}
 GROUPS=		${PROMETHEUS_GROUP}
 
 PLIST_SUB+=	PROMETHEUS_CONSOLE_LIBRARIES_DIR=${PROMETHEUS_CONSOLE_LIBRARIES_DIR} \
 		PROMETHEUS_CONSOLES_DIR=${PROMETHEUS_CONSOLES_DIR} \
 		PROMETHEUS_GROUP=${PROMETHEUS_GROUP} \
 		PROMETHEUS_USER=${PROMETHEUS_USER}
 
 OPTIONS_DEFINE=	DOCS
 
 BUILD_USER?=		${USER}
 LD_FLAG_STRING=		-s ${LD_FLAG_X_PREFIX}.Version=${PORTVERSION} \
 			${LD_FLAG_X_PREFIX}.Revision=${PORTREVISION} \
 			${LD_FLAG_X_PREFIX}.Branch=release-${PORTVERSION:R} \
 			${LD_FLAG_X_PREFIX}.BuildUser=${BUILD_USER} \
 			${LD_FLAG_X_PREFIX}.BuildDate=${SOURCE_DATE_EPOCH:U${SOURCE_DATE_EPOCH_CMD:sh}}
 LD_FLAG_X_PREFIX=	-X github.com/prometheus/common/version
 
 PROMETHEUS_CONSOLES_DIR?=		${DATADIR}/consoles
 PROMETHEUS_CONSOLE_LIBRARIES_DIR?=	${DATADIR}/console_libraries
 PROMETHEUS_DB_DIR?=			/var/db/${PORTNAME}
 PROMETHEUS_GROUP?=			prometheus
 PROMETHEUS_USER?=			prometheus
 
 # Bring DISTINFO_FILE into scope so we can get the timestamp.
 .include <bsd.port.pre.mk>
 
-SOURCE_DATE_EPOCH_CMD=	$$(${GREP} TIMESTAMP ${DISTINFO_FILE} | ${SED} -e 's/[^0-9]//g') \
-			'+%Y%m%d-%T' -ur date
+SOURCE_DATE_EPOCH_CMD=	date -ur $$(${GREP} TIMESTAMP ${DISTINFO_FILE} | ${SED} -e 's/[^0-9]//g') \
+			'+%Y%m%d-%T'
 
 # This file includes the GH_TUPLE and a post-extract section. Generated by
 # make gomod-vendor.  Ensure that the GH_TUPLE in this file is +=, otherwise
 # it will clobber our assets tuple above.
 # Generated with: sudo env M2T_GITHUB=$M2T_GITHUB make gomod-vendor > out
 # sudo required because gomod-vendor appears to be doing special things as root
 .include "Makefile.modules"
 
 post-patch:
 	@${LN} -s ${WRKSRC_assets}/web/ui/assets_vfsdata.go \
 		${WRKSRC}/web/ui/assets_vfadata.go
 
 post-install:
 	${MKDIR} ${STAGEDIR}${DESTDIR}${PROMETHEUS_CONSOLES_DIR}
 	${MKDIR} ${STAGEDIR}${DESTDIR}${PROMETHEUS_CONSOLE_LIBRARIES_DIR}
 	${INSTALL_DATA} \
 		${WRKSRC}/documentation/examples/prometheus.yml \
 		${STAGEDIR}${LOCALBASE}/etc/prometheus.yml.sample
 	( cd ${WRKSRC}/console_libraries \
 		&& ${COPYTREE_SHARE} . ${STAGEDIR}${PROMETHEUS_CONSOLE_LIBRARIES_DIR} )
 	( cd ${WRKSRC}/consoles \
 		&& ${COPYTREE_SHARE} . ${STAGEDIR}${PROMETHEUS_CONSOLES_DIR} )
 
 post-install-DOCS-on:
 	${MKDIR} ${STAGEDIR}${DOCSDIR}
 	( cd ${WRKSRC}/docs \
 		&& ${COPYTREE_SHARE} . ${STAGEDIR}${DOCSDIR} )
 
 .include <bsd.port.post.mk>