needs.yml

name: CI

on: [push]

jobs:
  setup:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v1
      - run: ./setup_test_infrastructure.sh
  build:
    needs: setup
    runs-on: 'ubuntu-latest'
    steps:
      - uses: actions/checkout@v1
      - run: |
          ./build.sh
          ./test.sh
        shell: bash
  shutdown:
    needs: build
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v1
      - run: ./shutdown_test_infrastructure.sh 

Thanks for the example, github's documentation of workflows really falls short on jobs dependency.