Can we define vars in dbt-project.yml and utilize that defined vars in dbt-project.yml itself.

I am trying utilize the vars in dbt-project.yml as a conditional logic for enabling, but getting
vars supplied to [configuration] = {}.
Are we not supposed to utilized vars inside dbt-project.yml

The problem I’m having

The context of why I’m trying to do this

What I’ve already tried

Some example code or error messages

Put code inside backticks
  to preserve indentation
    which is especially important 
      for Python and YAML! 

No: https://docs.getdbt.com/reference/dbt-jinja-functions/dbt-project-yml-context

> (Note: only variables defined with --vars are available)

Note: @Owen originally posted this reply in Slack. It might not have transferred perfectly.