alock: unstable-2017-07-20 -> 2.5.1

stdenv.mkDerivation rec {

  pname = "alock";

  version = "unstable-2017-07-20";

  version = "2.5.1";

  src = fetchFromGitHub {

    owner = "Arkq";

    repo = "alock";

    rev = "2035e1d4a2293432f5503e82d10f899232eb0f38";

    sha256 = "sha256-Rm00ytSfEv5Wljz4f/4bbyrK3sCV/oRUwz4DKx0pya8=";

    rev = "refs/tags/v${version}";

    hash = "sha256-xfPhsXZrTlEqea75SvacDfjM9o21MTudrqfNN9xtdcg=";

  };

  PAM_DEFAULT_SERVICE = "login";