We all use and love leiningen, the ultimate Clojure build tool. Sometimes, though, we want leiningen to do something it doesn't know how to do. Here is a short and simple tutorial on making your own leiningen tasks. In your project.clj, after the (defproject ...) form, add the following: (ns leiningen.hello) (defn hello [project] (println "Hello Leiningen!") (println "ants")) Now, when you run lei