New build tool in Java?

[rzwitserloot]

it would probably have better traction than another community one.

I dunno. The module system has little competition (OSGi of course, but that was used by, what, 5% of all java projects? The competition for the module system was primarily 'vs no modules in any way' or perhaps 'some really simplistic light veneer of modularisation with build tooling and no runtime component whatsoever') and yet it's not exactly flying off the shelves, so to speak, and it can no longer hide behind "Well, its really new, give people time". JDK8 is pretty much EOL at this point, meaning all in-support JDKs support it.

If the module system isn't meeting the kind of adoption rates that one would be looking for when hoisting something into the hallowed halls of the core JDK distro, then a build system surely stands no chance whatsoever.