Windows after Linux chained build jobs

linux-windows-appveyor.yml

environment:
  matrix:

  # Linux job
  - job_name: Linux build
    appveyor_build_worker_image: ubuntu
  
  # Windows job
  - job_name: Windows build
    job_depends_on: Linux build
    appveyor_build_worker_image: Visual Studio 2017

matrix:
  fast_finish: true

for:
-
  matrix:
    only:
      - job_name: Linux build
  build_script:
  - sh: echo "Building on Linux..."
  - sh: sleep 5
  test: off
  
-
  matrix:
    only:
      - job_name: Windows build
  build_script:
  - ps: Write-Host "Building on Windows..."
  - ps: Start-Sleep 5
  - ps: Write-Host "Deploying"
  test: off

This feature was kind of experimental, but we are definitely going to document it. Glad it worked for you!