Recompiling compiled app with different optimization type

[konrad-ch]

I have an rather odd problem - I compiled my project with only whitespace optimizations, next I do some changes on the result "app.js" file (please don't ask me why... it's just required in my project). And now I want to recompile modified "app.js" file with advanced optimizations. Is it can be done using lein-cljbuild? Maybe some command line hack? I would be very grateful for any kind of help....