:: Starting full system upgrade... resolving dependencies... warning: cannot resolve "python2-apsw", a dependency of "calibre3" warning: cannot resolve "python2-beautifulsoup4", a dependency of "calibre3" warning: cannot resolve "python2-cssselect", a dependency of "calibre3" warning: cannot resolve "python2-css-parser", a dependency of "calibre3" warning: cannot resolve "python2-dbus", a dependency of "calibre3" warning: cannot resolve "python2-html2text", a dependency of "calibre3" warning: cannot resolve "python2-html5-parser", a dependency of "calibre3" warning: cannot resolve "python2-lxml", a dependency of "calibre3" warning: cannot resolve "python2-mechanize", a dependency of "calibre3" warning: cannot resolve "python2-netifaces", a dependency of "calibre3" warning: cannot resolve "python2-pillow", a dependency of "calibre3" warning: cannot resolve "python2-pyqt5", a dependency of "calibre3" warning: cannot resolve "python2-regex", a dependency of "calibre3" :: The following package cannot be upgraded due to unresolvable dependencies: calibre3 :: Do you want to skip the above package for this upgrade? [y/N] n error: failed to prepare transaction (could not satisfy dependencies) :: unable to satisfy dependency 'python2-apsw' required by calibre3 :: unable to satisfy dependency 'python2-beautifulsoup4' required by calibre3 :: unable to satisfy dependency 'python2-cssselect' required by calibre3 :: unable to satisfy dependency 'python2-css-parser' required by calibre3 :: unable to satisfy dependency 'python2-dbus' required by calibre3 :: unable to satisfy dependency 'python2-html2text' required by calibre3 :: unable to satisfy dependency 'python2-html5-parser' required by calibre3 :: unable to satisfy dependency 'python2-lxml' required by calibre3 :: unable to satisfy dependency 'python2-mechanize' required by calibre3 :: unable to satisfy dependency 'python2-netifaces' required by calibre3 :: unable to satisfy dependency 'python2-pillow' required by calibre3 :: unable to satisfy dependency 'python2-pyqt5' required by calibre3 :: unable to satisfy dependency 'python2-regex' required by calibre3