Index: net-mgmt/prometheus2/Makefile
===================================================================
--- net-mgmt/prometheus2/Makefile
+++ net-mgmt/prometheus2/Makefile
@@ -1,7 +1,7 @@
 # $FreeBSD$
 
 PORTNAME=	prometheus
-PORTVERSION=	2.1.0
+PORTVERSION=	2.2.0
 DISTVERSIONPREFIX=	v
 CATEGORIES=	net-mgmt
 
@@ -36,7 +36,8 @@
 do-build:
 .for bin in ${PROMETHEUS_BINARIES}
 	( cd ${GO_WRKSRC}/cmd/${bin} ; \
-		${SETENV} ${GO_ENV} go install -ldflags "${LD_FLAG_STRING}" )
+		${SETENV} ${MAKE_ENV} ${GO_ENV} \
+		go install -ldflags "${LD_FLAG_STRING}" )
 .endfor
 
 do-install:
Index: net-mgmt/prometheus2/distinfo
===================================================================
--- net-mgmt/prometheus2/distinfo
+++ net-mgmt/prometheus2/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1516749966
-SHA256 (prometheus-prometheus-v2.1.0_GH0.tar.gz) = c6fc92d695c9af30574eb41af5e0e89f4fde9a04a3169ba58aa2b2f80d5862a4
-SIZE (prometheus-prometheus-v2.1.0_GH0.tar.gz) = 5669858
+TIMESTAMP = 1520794678
+SHA256 (prometheus-prometheus-v2.2.0_GH0.tar.gz) = e1e8eee7e3d0b1844b00f9bc06a63012284b9a82a094476be82551ef45e6d818
+SIZE (prometheus-prometheus-v2.2.0_GH0.tar.gz) = 5629498