diff --git a/koji-setup/koji-add-builder.sh b/koji-setup/koji-add-builder.sh
index 7a28718..67aa2eb 100644
--- a/koji-setup/koji-add-builder.sh
+++ b/koji-setup/koji-add-builder.sh
@@ -77,7 +77,7 @@ if [ $KOJI_BUILD_FQDN eq $KOJI_HUB_FQDN ] ; then
 else
     ## On the HUB
     # check if nfs has been installed on the hub (only need to install once) 
-    if [ ! "dnf list installed | grep nfs-server" ] ; then
+    if [ -z $(dnf list installed | grep nfs-server) ] ; then
         # add nfs share for koji files direcory to hub
         curl $SILENT $SCRIPT_GIT/koji-deploy-nfs-server.sh > $SCRIPT_DIR/koji-deploy-nfs-server.sh
         chmod o+x $SCRIPT_DIR/koji-deploy-nfs-server.sh