{ mkDerivation, array, base, bifunctors, comonad, containers
, contravariant, fetchurl, ghc-prim, hspec, profunctors, QuickCheck
, semigroups, StateVar, stm, tagged, template-haskell
, th-abstraction, transformers, transformers-compat
, unordered-containers
}:
mkDerivation {
  pname = "invariant";
  version = "0.5";
  src = fetchurl {
    url = "http://example.org/";
    sha256 = "abc";
  };
  libraryHaskellDepends = [
    array base bifunctors comonad containers contravariant ghc-prim
    profunctors semigroups StateVar stm tagged template-haskell
    th-abstraction transformers transformers-compat
    unordered-containers
  ];
  testHaskellDepends = [ base hspec QuickCheck template-haskell ];
  homepage = "https://github.com/nfrisby/invariant-functors";
  description = "Haskell98 invariant functors";
  license = stdenv.lib.licenses.bsd2;
}