I'm not sure why but when I enter the REPL through $ clojure or $ lein repl, >(clojure-version) says '1.2.1'. I want it to say '1.5'.
Version 1.5 works fine in my projects managed by lein. I just want to tell lein to always use 1.5 by default, instead of 1.2.
Currently this isn't supported outside a project, but it's being worked on: https://github.com/technomancy/leiningen/issues/966
A workaround for now is just to specify it in your project.clj
Further recommendation: upgrade to Leiningen 2.0.
来源：https://stackoverflow.com/questions/15170388/how-to-change-clojure-or-leins-clojure-default-version