Validation#flatmap is crazy

gistfile1.txt

    val a = fromEither(listing).toValidationNEL
    val retr = { x:VideoListing => fromEither(lister.retrieveReport(x)).toValidationNEL }
    

    val res0 =  for (
      l <- a;
      rep <- retr(l)
    ) yield { rep }


main.scala:75: Unable to unapply type `scalaz.package.ValidationNEL[Exception,com.listify.upload.VideoListing]` into a type constructor of kind `M[_]` that is classified by the type class `scalaz.Bind`
[error] 1) Check that the type class is defined by compiling `implicitly[scalaz.Bind[<type constructor>]]`.
[error] 2) Review the implicits in object Unapply, which only cover common type 'shapes'
[error] (implicit not found: scalaz.Unapply[scalaz.Bind, scalaz.package.ValidationNEL[Exception,com.listify.upload.VideoListing]])
[error]       l <- a;