{ mkDerivation, array, base, Cabal, containers, directory, fetchurl
, filepath, mtl, process
}:
mkDerivation {
  pname = "happy";
  version = "1.19.8";
  src = fetchurl {
    url = "http://example.org/";
    sha256 = "abc";
  };
  isLibrary = false;
  isExecutable = true;
  setupHaskellDepends = [ base Cabal directory filepath ];
  executableHaskellDepends = [ array base containers mtl ];
  testHaskellDepends = [ base process ];
  homepage = "https://www.haskell.org/happy/";
  description = "Happy is a parser generator for Haskell";
  license = stdenv.lib.licenses.bsd2;
}