scala - 単純な Argonaut 式をコンパイルできませんか?

Question

これは Scalaz と Argonaut の非互換性の問題ですか、それとも別の問題ですか?

scala> import argonaut._
import argonaut._

scala> import Argonaut._
import Argonaut._

scala> import scalaz._
import scalaz._

scala> import Scalaz._
import Scalaz._

scala> val jsonString: Json = jString("JSON!")
java.lang.IncompatibleClassChangeError: Found class scalaz.Memo, but interface was expected
  at argonaut.PrettyParams.<init>(PrettyParams.scala:112)
  at argonaut.PrettyParamss$class.$init$(PrettyParams.scala:252)
  at argonaut.Argonaut$.<init>(Argonaut.scala:3)
  at argonaut.Argonaut$.<clinit>(Argonaut.scala)
  ... 43 elided

build.sbt

  "io.argonaut" %% "argonaut" % "6.1",
  "org.scalaz" %% "scalaz-core" % "7.2.4",