Without knowing too much, cant you do that easily enough for the other two? At least scala, you could package scala-library.jar with all the other classes (I would imagine clojure wouldnt be too much extra).
Of course unless you run it through proguard or similar, its gonna me massive.
well it is still 2-3 od MB of weight. I guess you could strip it down easy enough, and package it. But if you are delivering a library - then it has to play nice with other libraries that may also want to use scala - if you really wanted you could jarjar it into its own namespace (!) but that would be pretty extreme.
If you write your app in scala, and unless you are deploying to a phone, it is rarely an issue (it doesn't bother me at all) - but Mirah as a drop in replacement for a java compiler, that is very compelling and something to watch.
Also - the fact that I use the scala libraries heavily means I need very few other deps myself - so for me it is a net win.
Of course unless you run it through proguard or similar, its gonna me massive.