buildController.startExecution(executorService, result -> {
                results.put(buildController, result);
                complete.countDown();
            });
        }

        awaitCompletion(complete);

        // Collect the failures in deterministic order
        ExecutionResult<Void> result = ExecutionResult.succeeded();
        for (BuildController buildController : controllers.values()) {

        callback.addConsumer(OutputFrame.OutputType.STDOUT, stdoutConsumer)
        callback.addConsumer(OutputFrame.OutputType.STDERR, stderrConsumer)
        dockerClient.execStartCmd(execCreateCmdResponse.getId()).exec(callback).awaitCompletion()
        Integer exitCode = dockerClient.inspectExecCmd(execCreateCmdResponse.getId()).exec().exitCode
        return new GradleExecResult(exitCode, stdoutConsumer.toString(Charsets.UTF_8), stderrConsumer.toString(Charsets.UTF_8))