I’m trying to use the value of an environment variable, and neither one of these approaches is working for me, since the variable is not being expanded:

Global env section:

 env:
   HOSTNAME: "${{ vars.HOSTNAME }}"
   STAGE_NAME: "${{ vars.STAGE_NAME }}"

Approach one:

    working-directory: /var/www/${{ env.HOSTNAME }}/releases

Approach two:

    run: |
      cd /var/www/${{ env.HOSTNAME }}/releases

How do I properly reference the ‘env.HOSTNAME’ variable in each of these cases?