root@builder-envoy-03:~# diff -u `which build-envoy-deb` build-envoy-future-deb
--- /usr/local/bin/build-envoy-deb      2020-10-06 11:47:42.131936680 +0000
+++ build-envoy-future-deb      2021-01-12 12:23:50.228979886 +0000
@@ -59,5 +59,5 @@
     $CHROOTEXEC apt-get -y install docker.io
 fi
 $CHROOTEXEC apt-get -y install git-buildpackage fakeroot debhelper bash-completion
-$CHROOTEXEC /bin/bash -c "export LC_ALL=C; cd $ENVOY_SRC && gbp buildpackage --git-builder='debuild -b -uc -us'"
+$CHROOTEXEC /bin/bash -c "export LC_ALL=C; cd $ENVOY_SRC && gbp buildpackage --git-upstream-tag='future/%(version)s' --git-builder='debuild -b -uc -us'"
 echo "Your build is successful, please cleanup /tmp/envoy-docker-build if not needed anymore."