NoUnknown =
    case list_to_integer(erlang:system_info(otp_release)) of
        N when N >= 26 ->
            %% Don't warn about unknown functions and types (of rebar3)
            [no_unknown];
	_N ->
	    []
    end.
[
    {minimum_otp_vsn, "19.3"},

    {erl_opts, [
        debug_info,
        warn_export_all,
        warn_export_vars,
        warn_missing_spec,
        warn_obsolete_guard,
        warn_shadow_vars,
        warn_unused_import,
        warnings_as_errors
    ]},

    {deps, [
        {'gpb', "~> 5.0"}
    ]},

    {dialyzer, [
        {warnings,
            NoUnknown ++ [
            unmatched_returns,
            error_handling,
            underspecs
        ]}
    ]}
].