Binary package “libghc-product-isomorphic-dev” in ubuntu focal

weaken applicative functor on products

 Weaken applicative functor which allows only product
 construction. Product constructions and deconstructions
 are always isomorphic.
 .
 This package provides a library for the Haskell programming language.
 See http://www.haskell.org/ for more information on Haskell.