diff --git a/.github/workflows/firebase_hosting.yml b/.github/workflows/firebase_hosting.yml
index 368d5b25..e5641171 100644
--- a/.github/workflows/firebase_hosting.yml
+++ b/.github/workflows/firebase_hosting.yml
@@ -14,20 +14,17 @@ jobs:
   firebase-deploy:
     # The type of runner that the job will run on
     runs-on: ubuntu-latest
-    env:
-      working-directory: ./www
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - uses: actions/checkout@v2
+        run: cd www
       - uses: borales/actions-yarn@v2.0.0
         with:
           cmd: install # will run `yarn install` command
-          working-directory: ${{env.working-directory}}
       - uses: borales/actions-yarn@v2.0.0
         with:
           cmd: build # will run `yarn install` command
-          working-directory: ${{env.working-directory}}
       - uses: w9jds/firebase-action@master
         with:
           args: deploy --only hosting