libghc-unlambda-dev 0.1.4.2-2build1 (amd64 binary) in ubuntu artful

 It is an interpreter of the Unlambda language, written in the pure,
 lazy, functional language Haskell.
 .
 This package provides a library for the Haskell programming language.
 See http://www.haskell.org/ for more information on Haskell.