diff --git a/.gitea/limbo_actions/buildkit-build-push/action.yaml b/.gitea/limbo_actions/buildkit-build-push/action.yaml
index 8f8bc04..2f7565e 100644
--- a/.gitea/limbo_actions/buildkit-build-push/action.yaml
+++ b/.gitea/limbo_actions/buildkit-build-push/action.yaml
@@ -75,6 +75,7 @@ runs:
         # Build names, convert csv (tag1:latest,tag2:x,tag3) to name=tag1:latest,name=tag2:x,tag
         OUTPUT_NAMES=""
         while IFS= read -r tag; do
+            [[ -z "$tag" ]] && continue
             OUTPUT_NAMES="${OUTPUT_NAMES:+$OUTPUT_NAMES,}name=$tag"
         done <<< "${{ inputs.tags }}"
         echo "output names: $OUTPUT_NAMES"