from /usr/share/bdisk/build.py

        if not os.path.isfile('{0}/extra/{1}.png'.format(basedir, bdisk['uxname'])):
            shutil.copy2(basedir + '/extra/bdisk.png', '{0}/{1}.png'.format(prepdir, bdisk['uxname']))
        else:
            shutil.copy2(basedir + '/extra/{0}.png'.format(bdisk['uxname']), '{0}/{1}.png'.format(prepdir, bdisk['uxname']))