Add initial gRPC server
diff --git a/env.sh b/env.sh
index 8f3a07c..c24eb91 100644
--- a/env.sh
+++ b/env.sh
@@ -12,6 +12,9 @@
 fi
 . $VENVDIR/bin/activate
 
+# add top-level voltha dir to pythonpath
+export PYTHONPATH=$PYTHONPATH:$VOLTHA_BASE/voltha
+
 # assign DOCKER_HOST_IP to be the main ip address of this host
 export DOCKER_HOST_IP=$(python voltha/nethelpers.py)