diff --git a/.github/workflows/firebase_hosting.yml b/.github/workflows/firebase_hosting.yml
index b067343d..e4582b2b 100644
--- a/.github/workflows/firebase_hosting.yml
+++ b/.github/workflows/firebase_hosting.yml
@@ -19,6 +19,7 @@ jobs:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - uses: actions/checkout@v2
       - run: cd www
+      - run: ls
       - uses: borales/actions-yarn@v2.0.0
         with:
           cmd: install # will run `yarn install` command