Workaround: add these lines to /etc/apt/sources.list.d/extra-ppas.list:
deb-src http://ppa.launchpad.net/ubuntu-mate-dev/ppa/ubuntu trusty main deb-src http://ppa.launchpad.net/ubuntu-mate-dev/trusty-mate/ubuntu trusty main deb-src http://ppa.launchpad.net/accessibility-dev/ppa/ubuntu trusty main
Workaround: add these lines to /etc/apt/ sources. list.d/ extra-ppas. list:
deb-src http:// ppa.launchpad. net/ubuntu- mate-dev/ ppa/ubuntu trusty main ppa.launchpad. net/ubuntu- mate-dev/ trusty- mate/ubuntu trusty main ppa.launchpad. net/accessibili ty-dev/ ppa/ubuntu trusty main
deb-src http://
deb-src http://