diff --git a/update_docker_images.sh b/update_docker_images.sh
index be73e0c..06279c2 100755
--- a/update_docker_images.sh
+++ b/update_docker_images.sh
@@ -69,7 +69,8 @@ fi
 if "$build"; then
     # Select an existing container builder, not merely check whether one exists.
     # Capture the list separately so a failed Docker command stops the script.
-    builders=$(docker buildx ls --format '{{.Name}} {{.Driver}}')
+    # DriverEndpoint contains the driver for builders and the endpoint for nodes.
+    builders=$(docker buildx ls --format '{{.Name}} {{.DriverEndpoint}}')
     builder=
     while read -r name driver; do
         if [[ "$driver" == docker-container ]]; then