Last time I posted this 7 years ago I wrote<p>> Note that while Mill's first target is Scala builds (as an alternative to SBT) there isn't much reason why Mill shouldn't be usable for other JVM/non-JVM languages too.<p>Now 7 years later, Mill indeed has first-class support for Java (<a href="https://mill-build.org/mill/javalib/intro.html" rel="nofollow">https://mill-build.org/mill/javalib/intro.html</a>) and Kotlin-JVM (<a href="https://mill-build.org/mill/kotlinlib/intro.html" rel="nofollow">https://mill-build.org/mill/kotlinlib/intro.html</a>). There's experimental work ongoing to expand that support to Kotlin-Multiplatform, Android, Python, and Javascript/Typescript, with ~20,000USD of bounties up for grabs (and a similar amount already paid out):<p>- <a href="https://github.com/orgs/com-lihaoyi/discussions/6">https://github.com/orgs/com-lihaoyi/discussions/6</a><p>We also recently started an engineering blog on build-engineering topics<p>- <a href="https://mill-build.org/blog/" rel="nofollow">https://mill-build.org/blog/</a><p>Take a look at the open bounties and get involved if you are interested in this kind of fast, easy, multi-language build tooling!