Do nested vars work?

.github/workflows/pa11y.yml

@@ -15,17 +15,14 @@ on:
   merge_group:
   pull_request:
 
-env:
-  REVIEW_APP: review-pr-${{ github.event.number }}
-
 jobs:
   test:
     if: contains(github.event.pull_request.labels.*.name, 'review') && contains(github.event.pull_request.labels.*.name, 'frontend')
     runs-on: ubuntu-latest
     environment: development
     env:
       BOT_TOKEN: ${{ secrets.WEBAPP_CONFIG_BOT_TOKEN }}
-      DOMAIN: eyrecovery-${{ inputs.workspace || env.REVIEW_APP }}.azurewebsites.net
+      DOMAIN: eyrecovery-${{ inputs.workspace || review-pr-${{ github.event.number }} }}.azurewebsites.net
     steps:
       -
         name: Checkout Code