diff --git a/.github/workflows/publish.yaml b/.github/workflows/publish.yaml
index 3db3089..f66d2ac 100644
--- a/.github/workflows/publish.yaml
+++ b/.github/workflows/publish.yaml
@@ -36,4 +36,5 @@ jobs:
         with:
           NO_PUSH: true
           MYBINDERORG_TAG: ${{ github.event.ref }} 
-          REPO2DOCKER_EXTRA_ARGS: --sub-dir pangeo-workflow-examples
\ No newline at end of file
+          REPO2DOCKER_EXTRA_ARGS: 
+            - --sub-dir=pangeo-workflow-examples
\ No newline at end of file