Make

I chose Make in part because the Racket community has make files for projects that were easy to use and adapt to my project. The reality is Make is still the best cross-platform cross-ecosystem build tool. Sure you could use something more tailored to your language or framework. But who has a stack so simple it only has one language or framework in it? Not me, certainly.

I use Make because it's so easy to model dependencies between various files and automatically regenerate outputs as inputs change.

Make lets me easily put together a fairly conventional interface for my projects, so whatever test tool I'm using for a project - pytest or something else - I can just "make test" and have it all happen for me