case os:getenv("TRAVIS") of
  "true" ->
    JobId   = os:getenv("TRAVIS_JOB_ID"),
    CONFIG1 = lists:keystore(coveralls_service_job_id, 1, CONFIG, {coveralls_service_job_id, JobId}),
    code:is_loaded(rebar3) =:= false andalso code:load_file(rebar3),
    case erlang:function_exported(rebar3, version, 0) of
      false -> lists:keystore(plugins, 1, CONFIG1, {plugins, [rebar_coveralls]});
      true  -> CONFIG1
    end;
  _      ->
    CONFIG
end.