compiling Clojure before Java sources

gistfile1.clj

;; Example from _Clojure Programming_; exposition on it, Leiningen, hooks,
;; and compilation order found therein. http://www.clojurebook.com

(defproject com.clojurebook/lein-mixed-source "1.0.0"
  :dependencies [[org.clojure/clojure "1.3.0"]]
  :aot :all)

(require '(leiningen compile javac))   
                               
(add-hook #'leiningen.compile/compile                                 
  (fn [compile project & args]                                        
    (apply compile project args)                                      
    (leiningen.javac/javac (assoc project :java-source-path "srcj"))))

Using leiningen 2 I get Unable to resolve symbol: add-hook in this context

This seems to fix it:

(require '(leiningen compile javac))
(require '(robert hooke))

(robert.hooke/add-hook #'leiningen.compile/compile
  (fn [compile project & args]
    (apply compile project args)
    (leiningen.javac/javac (assoc project :java-source-paths ["src/java"]))))