You're building something like buck/blaze and replacing starlark with YAML ? I want a full programming language when defining complex rules. Build systems do a

You're building something like buck/blaze and replacing starlark with YAML ? I want a full programming language when defining complex rules. Build systems do a lot more than execute commands. You lost me there. Buck/Blaze aren't perfect but configuration was never an issue. Moon like it is currently is a glorified task runner.