Short answer: just say

import Array(Array) import Data.Array.Unboxed

I'd prefer it if Data.Array was the fully overloaded version, but sadly IArray requires multi-param type classes and we don't want to knobble the libraries too much for non-MPTC compilers. The current situation is a bit unsavoury, though; perhaps Data.Array.IArray should re-export the Array type. Cheers, Simon