Disable golang proxy

GOPROXY is used to download packages from fastest source,
disable it will let all packages download from github.com

component/golang/buildout.cfg

@@ -80,6 +80,7 @@ md5sum = dc57f93f323e9f8189e5ffc1f223e346
 # go1.17 needs go1.4 to bootstrap
 environment-extra =
   GOROOT_BOOTSTRAP=${golang14:location}
+  GOPROXY=off
 
 # ---- infrastructure to build Go workspaces / projects ----
 
@@ -191,7 +192,7 @@ command = bash -c ". ${gowork:env.sh}
 		# external module, e.g. golang.org/x/tools/gopls@v0.4.3
 		*@*)
 			echo GOMOD \$x
-			GO111MODULE=on go install ${gowork:buildflags} -v \$x
+			GO111MODULE=on GOPROXY=off go install ${gowork:buildflags} -v \$x
 			;;
 
 		# locally-cloned module source, e.g. <module-src-location>:./...
@@ -199,13 +200,13 @@ command = bash -c ". ${gowork:env.sh}
 			echo GOMODSRC \$x
 			dir=\"\$${x%%:*}\"
 			arg=\"\$${x#*:}\"
-			(cd \$dir && GO111MODULE=on go install ${gowork:buildflags} -v \$arg)
+			(cd \$dir && GO111MODULE=on GOPROXY=off go install ${gowork:buildflags} -v \$arg)
 			;;
 
 		# non-module
 		*)
 			echo GOPKG \$x
-			GO111MODULE=off go install ${gowork:buildflags} -v \$x
+			GO111MODULE=off GOPROXY=off go install ${gowork:buildflags} -v \$x
 			;;
 		esac
 	done