Неможливо знайти пакет libffi та libffi5-dev на Ubuntu 12.04.4 через apt-get
$ sudo apt-get install libffi libffi5-dev Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package libffi E: Unable to locate package libffi5-dev ще одна спроба: $ sudo apt-get install libffi5 libffi-dev Reading package lists... Done Building dependency tree Reading state information... Done E: …