diff --git a/functions-common b/functions-common
index 4bc3bbaac5..3e29e8c7de 100644
--- a/functions-common
+++ b/functions-common
@@ -1094,7 +1094,8 @@ function service_check() {
     fi
 
     # Check if there is any falure flag file under $SERVICE_DIR/$SCREEN_NAME
-    failures=`ls "$SERVICE_DIR/$SCREEN_NAME"/*.failure 2>/dev/null`
+    # make this -o errexit safe
+    failures=`ls "$SERVICE_DIR/$SCREEN_NAME"/*.failure 2>/dev/null || /bin/true`
 
     for service in $failures; do
         service=`basename $service`
diff --git a/stack.sh b/stack.sh
index c95199769f..d43a73a889 100755
--- a/stack.sh
+++ b/stack.sh
@@ -601,6 +601,9 @@ function err_trap {
     exit $r
 }
 
+
+set -o errexit
+
 # Print the commands being run so that we can see the command that triggers
 # an error.  It is also useful for following along as the install occurs.
 set -o xtrace