Curiouser and curiouser... > $ ldconfig -p | grep libGL.so.1
libGL.so.1 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libGL.so.1 libGL.so.1 (libc6) => /usr/lib/i386-linux-gnu/libGL.so.1 > $ ls -lgo /usr/lib/x86_64-linux-gnu/libGL.so.* lrwxrwxrwx 1 50 Aug 11 15:45 /usr/lib/x86_64-linux-gnu/libGL.so.1 -> /etc/alternatives/glx--libGL.so.1-x86_64-linux-gnu > $ dpkg -S /usr/lib/x86_64-linux-gnu/libGL.so.* diversion by glx-diversions from: /usr/lib/x86_64-linux-gnu/libGL.so.1 diversion by glx-diversions to: /usr/lib/mesa-diverted/x86_64-linux-gnu/libGL.so.1 libgl1:amd64: /usr/lib/x86_64-linux-gnu/libGL.so.1 During the next run of apt, the post-install re-ran and completed successfully (though apt did complain about it not running any of the 4 expected actions).
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