diff --git a/.gitea/workflows/demo.yaml b/.gitea/workflows/demo.yaml
index ae9f973..f4b3fc9 100644
--- a/.gitea/workflows/demo.yaml
+++ b/.gitea/workflows/demo.yaml
@@ -21,7 +21,7 @@ jobs:
           pwd
           touch testfile
           ls
-          docker run --rm -v "$pwd:$pwd" -w "$pwd" 'aergus/latex' /bin/bash -eo pipefail ls
+          docker run --rm -v "$pwd:$pwd" -w "$pwd" 'aergus/latex' /bin/bash -eo pipefail '-c' '--' $'ls'
       - name: compile
         uses: xu-cheng/texlive-action@v2
         with: