I eventually succeeded to finish upgrading the system. The only thing I had to manually fix was to set TERM=xterm because the installer was not able to pop-up the purple selection screen with my self-compiled st terminal.
Do not know if this is related to this automatically generated bug report though... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1703866 Title: package libssl1.0.0:amd64 1.0.2g-1ubuntu4.8 failed to install/upgrade: subprocess installed post-installation script returned error exit status 255 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/debconf/+bug/1703866/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs