What is the primary advantage over make? I imagine it looks much easier to read for a novice than make, but there are probably much better reasons than this one.
anything different than this seems to become very messy super fast, specially compared to make files
not to say, using identantion kills a lot of stuff people use this days, like js linters and whatnot.
not saying this tools are not useful in specific circumstances, which i can happily say i never faced.
*with a "setup" target you could even install node.js or fly or whatever you need before even being able to execute fly.
Fly tasks are co-routine-wrapped generators, so you get modern async flow inside your tasks out of the box and right off the bat.
TBH I don't know exactly how Fly is better than make since I don't use make since college years.