After a request from Esteban, I changed the Pharo VM PPA location from ppa:cassou/pharo to ppa:pharo/stable. Please issue the following commands to update your system: $ sudo rm -f /etc/apt/sources.list.d/cassou-emacs-quantal.list $ sudo add-apt-repository ppa:pharo/stable $ sudo apt-get update Sorry for the additional effort -- Damien Cassou http://damiencassou.seasidehosting.st "Success is the ability to go from one failure to another without losing enthusiasm." Winston Churchill