C dpkg-buildpackage нормально собирается и подписывается. В pbuilder и в более ограниченных средах я получаю:
cp: cannot stat 'debian/tmp/etc/X11/app-defaults/XScreenSaver': No such file or directory
dh_install: cp -a debian/tmp/etc/X11/app-defaults/XScreenSaver debian/xscreensaver-data//etc/X11/app-defaults/ returned exit code 1
mv debian/xscreensaver-data/etc/X11/app-defaults/XScreenSaver \
debian/xscreensaver-gl/etc/X11/app-defaults/XScreenSaver-gl
install -m 644 -o root -g root driver/XScreenSaver.ad-nogl \
debian/xscreensaver-data/etc/X11/app-defaults/XScreenSaver-nogl
chmod +x debian/xscreensaver/usr/share/xscreensaver/xscreensaver-wrapper.sh