clojure macro instantiation error

instantiation_exception_error.clj

(defmacro make-obj [n & args] 
    (let [name (if (instance? clojure.lang.Symbol n) n  (eval n))]
        `{(keyword '~name) [~@args]}  ))

(make-obj bar :foo)  ; => {:bar [:foo]}
(make-obj (symbol (str (name :bar))) :foo)  ; => {:bar [:foo]}

(defmacro make-fn [n & b] `(defn ~n ~@b))
(make-fn keyword-maker [k] (make-obj (symbol (str (name k))) :foo))  ;=> Thrown class java.lang.InstantiationException