title: Azure Pipelines Matrix variables
body: <p>Can somebody explain me how I can access the variable <code>build</code> from this matrix job setup?</p>
  
  <pre><code>parameters:
    # job ---
    ...
    configurations: [Release, Debug]
    ...
  
  jobs:
    - job: nightly
      displayName: Nightly
      strategy:
        matrix:
          ${{ each configuration in parameters.configurations }}:
            ${{ configuration }}:
              build: ${{ configuration }} # !PARAMETER/VARIABLE FOR JOB SET HERE!
              ${{ if ne(configuration, 'Release') }}:
                dependsOn: Release
      pool:
        vmImage: ${{ parameters.image }}
      timeoutInMinutes: ${{ parameters.timeoutInMinutes }}
      steps:
        - powershell: Write-Host ${{ parameters.build }}
          displayName: 'Write Configuration: ${{ parameters.build }}'
  </code></pre>
  
  <p>The jobs powershell task is showing <code>Write Configuration:</code> so the variable is null?</p>