Hello,

I’m able to make this kind of setup work:

deploy-prod:
    name: Deploy prod
    runs-on: linux
    needs: deploy-staging
    strategy:
      matrix:
        include:
          - environment: europe
            url: https://europe.my.service
          - environment: asia
            url: https://asia.my.service
          - environment: america
            url: https://america.my.service
          - environment: africa
            url: https://africa.my.service
    environment:
      url: ${{ matrix.url }}
      name: ${{ matrix.environment }}
    steps:
      - uses: actions/checkout@v2
  - name: deploy
    uses: ./.github/actions/deployments
    with:
      version: ${{ needs.deploy-staging.outputs.version }}
      environment: ${{ matrix.environment }}

I did not test with the ‘short’ version: environment: ${{matrix.xxx}}

@ngraef you use a on: deployment but the environment syntax will already manage the deployment (creation, change status, … ). So here it is like you have a 'when a new deployment is created, create a new deployment". Fortunatly, github prevent this infinite circle to happens.