{ mkDerivation, base, containers, fetchurl, validity }:
mkDerivation {
  pname = "validity-containers";
  version = "0.2.0.0";
  src = fetchurl {
    url = "http://example.org/";
    sha256 = "abc";
  };
  libraryHaskellDepends = [ base containers validity ];
  homepage = "https://github.com/NorfairKing/validity#readme";
  description = "Validity instances for containers";
  license = stdenv.lib.licenses.mit;
}