DirectoryProperty flattenedAsciidocDirectory = project.getObjects().directoryProperty();
            flattenedAsciidocDirectory.set(extension.getUserManual().getStagingRoot().dir("raw"));
            task.getOutputs().dir(flattenedAsciidocDirectory);
            task.getExtensions().getExtraProperties().set("destinationDirectory", flattenedAsciidocDirectory);
            task.into(flattenedAsciidocDirectory);
        });