Use the correct boxed type for Unit.
Use the correct boxed type for Unit.

khronnuz/shapeless,milessabin/shapeless,roberth/shapeless,TomasMikula/shapeless,notxcain/shapeless,joescii/shapeless,tek/shapeless,wheaties/shapeless,retronym/shapeless,lukasz-golebiewski/shapeless,alexarchambault/shapeless,triggerNZ/shapeless,Atry/shapeless,fthomas/shapeless,clhodapp/shapeless,lambdista/shapeless,malcolmgreaves/shapeless,isaka/shapeless,liff/shapeless