You just need to add that line to the :dependencies
section of your project.clj file so it looks something like this:
...
:dependencies [[org.clojure/clojure "1.5.1"]
[lamina "0.5.0-rc3"]]
...
Then, use it in wherever you need it:
(ns myproj.core
(:require [lamina.core :as lamina]))
This would make it so you call the channel function like this: (lamina/channel 1 2 3)
Or in the repl:
user=> (use 'lamina.core)
nil
user=> (def ch (channel 1 2 3))
#'user/ch
user=> ch
<== [1 2 3 …]