return result;
            }
        }

        private Deferrable<Try<TransformStepSubject>> createInvocation() {
            TransformStepSubject initialSubject = TransformStepSubject.initial(artifact);
            BoundTransformStep initialStep = transformSteps.get(0);
            Deferrable<Try<TransformStepSubject>> invocation = initialStep.getTransformStep()

                return new TransformStepBuildOperation() {
                    @Override
                    protected TransformStepSubject transform() {
                        return transformStep
                            .createInvocation(TransformStepSubject.initial(artifact), upstreamDependencies, context)
                            .completeAndGet()
                            .get();
                    }

    protected final Transform transform;
    protected final File inputArtifact;
    private final TransformDependencies dependencies;
    private final TransformStepSubject subject;

    private final TransformExecutionListener transformExecutionListener;
    private final BuildOperationRunner buildOperationRunner;
    private final BuildOperationProgressEventEmitter progressEventEmitter;