Ubuntu used a patch for this, but it's just a work-around for now and multiple upstream's developers told me that is not the right approach to use. -- debbug#555134 ...
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ID Status Resolution Sev Product Comp Assignee Reporter Summary
43766 NEW --- nor Sisyphus xscreens grenka mistor-klimaks Конфликт man6 файлов в пакете xscreensaver-modules-gl

File a new bug in the "xscreensaver-modules-gl" component of the "Sisyphus" product