Could you please run `sudo apt update` and see if that resolves the issue? Update needs to be run after changing repositories, otherwise apt won't know about the contents of the new ones.
** Changed in: apt (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/1705040 Title: can't get source package To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1705040/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs