diff --git a/build_nfs.sh b/build_nfs.sh
index a6c8b4c..f2a7b13 100755
--- a/build_nfs.sh
+++ b/build_nfs.sh
@@ -13,6 +13,9 @@
 NFSDIR="/nfs/$NAME"
 DEST=${DEST:-/opt/stack}
 
+# Option to use the version of devstack on which we are currently working
+USE_CURRENT_DEVSTACK=${USE_CURRENT_DEVSTACK:-1}
+
 # remove old nfs filesystem if one exists
 rm -rf $DEST