Unable to lein-try different Clojure version

[ulsa]

$ grep try ~/.lein/profiles.clj
        [lein-try "0.4.3"]]}}

$ lein try org.clojure/clojure "1.7.0-alpha1"
...
Clojure 1.6.0
...
user=> *clojure-version*
{:major 1, :minor 6, :incremental 0, :qualifier nil}

$ lein try org.clojure/clojure "1.5.1"
...
Clojure 1.6.0
...
user=> *clojure-version*
{:major 1, :minor 6, :incremental 0, :qualifier nil}