task.setClasspath(layout.files());
            task.getReports().getXml().getOutputLocation().set(new File(checkstyle.getReportsDir(), "checkstyle-api.xml"));
        });
    }

    private static class DeduplicatePackageInfoFiles implements Spec<File> {

        private final Pattern pattern = Pattern.compile("package\\s*([^;\\s]+)\\s*;");