Why does this shapeless code not compile?

I'm trying to follow the answer here https://stackoverflow.com/a/31641779/1586965

scalaVersion := "2.11.8"
val shapelessV = "2.3.3"

Firstly the following lines do not compile (it expects String, but witness.value.name is of type NameType

v <- m.get(witness.value.name)

So I tried changing to this

v <- m.get(witness.value.name.toString)

Then I try to get the example working, i.e.

case class Address(street: String, zip: Int)
case class Person(name: String, address: Address)

import FromMap._
import ConvertHelper.to
object Example {


  val mp = Map(
    "name" -> "Tom",
    "address" -> Map("street" -> "Jefferson st", "zip" -> 10000)
  )

  to[Person].from(mp)
}

But I get

could not find implicit value for parameter fromMap: com.asos.datalake.staging.FromMap[R]