File buildFile = uud.getInstallPackage();
if (buildFile != null) {
LOG.log(Level.INFO, "Expanding zip file " + buildFile.getPath());
File stageDirectory = initStageDirectory();
ZipExtractor extractor = new ZipExtractor(buildFile);
extractor.extract(stageDirectory);
LOG.log(Level.INFO, "Extraction finished");
Installation installation = new Installation(stageDirectory,
stageDirectory);
if (!installation.isValid(stageDirectory)) {
LOG.log(Level.INFO, "Extraction produed an invalid NasuTekDS" +