Best sbt-web SASS compiler?

What’s the best option for using SASS with Playframework these days? The two options I can see are either sbt-sass, which uses the Ruby compiler, or sbt-sassify, which uses libsass via JNI. I use the latter in my project and while it works fine it’s not very actively maintained so it won’t, for example, compile the latest version of Bootstrap using newer versions of libsass (I don’t blame the maintainer; I’m sure he’s busy.)

Various other SBT web pipeline tools like sbt-less and sbt-stylus at least live under the SBT github organisation which, at least to me, suggests they’ll be maintained with the rest of the Play framework. Any chance of Lightbend or Play adopting a SASS compiler?