{ mkDerivation, base, fetchurl, ghc-prim, pretty }:
mkDerivation {
  pname = "GenericPretty";
  version = "1.2.1";
  src = fetchurl {
    url = "http://example.org/";
    sha256 = "abc";
  };
  libraryHaskellDepends = [ base ghc-prim pretty ];
  homepage = "https://github.com/RazvanRanca/GenericPretty";
  description = "A generic, derivable, haskell pretty printer";
  license = stdenv.lib.licenses.bsd3;
}