{ mkDerivation, base, doctest, fetchurl, hedgehog }:
mkDerivation {
  pname = "partial-semigroup";
  version = "0.3.0.2";
  src = fetchurl {
    url = "http://example.org/";
    sha256 = "abc";
  };
  libraryHaskellDepends = [ base ];
  testHaskellDepends = [ base doctest hedgehog ];
  homepage = "https://github.com/chris-martin/partial-semigroup";
  description = "A partial binary associative operator";
  license = stdenv.lib.licenses.asl20;
}