gistfile1.txt

user=> (:require [datomic.api :as d]
  #_=>           [clojure.data.codec.base64 :as b64]
  #_=>           (intake-mixpanel
  #_=>             [config :as config]
  #_=>             [util :as util])
  #_=>           [intake-mixpanel.datomic.schema :as schema])
CompilerException java.lang.ClassNotFoundException: datomic.api, compiling:(/tmp/form-init18989935185954061.clj:1:1)

user=> (require '[datomic.api :as d])

Whenever you see class not found exception while trying to require stuff, especially stuff we are unlikely to have broken, then it's just a mistake in the require syntax.