libghc-hashable-dev 1.1.2.0-1build1 (i386 binary) in ubuntu precise

 This package provides a library for the Haskell programming language.
 See http://www.haskell.org/ for more information on Haskell.
 .
 It defines a class, Hashable, for types that can be converted to a
 hash value. This class exists for the benefit of hashing-based data
 structures. The package provides instances for basic types and a way
 to combine hash values.