Did you change any files on your system? Such error may happen if you for example switched shebang of /usr/bin/pycompile to python3.
What is the first line of /usr/bin/pycompile? What is the output of this command? $(head -n1 /usr/bin/pycompile | sed "s/#\!//") --version ** Changed in: sphinx (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1555468 Title: package python-sphinx 1.2.3+dfsg-1ubuntu3 failed to install/upgrade: le sous-processus script post-installation installé a retourné une erreur de sortie d'état 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sphinx/+bug/1555468/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs