{ mkDerivation, base, fetchurl, filepath, parsec }:
mkDerivation {
  pname = "csv";
  version = "0.1.2";
  src = fetchurl {
    url = "http://example.org/";
    sha256 = "abc";
  };
  libraryHaskellDepends = [ base filepath parsec ];
  description = "CSV loader and dumper";
  license = stdenv.lib.licenses.mit;
}