diff --git a/.gitea/workflows/demo.yaml b/.gitea/workflows/demo.yaml
index 06115a3..9da5029 100644
--- a/.gitea/workflows/demo.yaml
+++ b/.gitea/workflows/demo.yaml
@@ -14,6 +14,8 @@ jobs:
           docker_image: aergus/latex
           run: |
             latexmk main.tex
+      - name: list files
+        run: ls
       - name: upload
         uses: actions/upload-artifact@v3
         with: