- project:
    name: sample-project
    param_1: !j2: '{{ missing_param | default("default_value") }}'
    param_2: '{param_1}'
    jobs:
      - sample-job

- job-template:
    name: sample-job
    param_3: '{param_2}-plus'
    builders:
      - shell: !j2: |
          echo {{ param_3 }}
