The ipv6.sixxs.org-trick doesn't work anymore. I don't know why, but it doesn't: Ign:5 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful InRelease Ign:6 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful Release Ign:7 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main amd64 Packages Ign:8 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main i386 Packages Ign:9 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main all Packages Ign:10 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main Translation-de_DE Ign:11 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main Translation-de Ign:12 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main Translation-en Ign:7 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main amd64 Packages Ign:8 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main i386 Packages Ign:9 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main all Packages Ign:10 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main Translation-de_DE Ign:11 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main Translation-de Ign:12 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main Translation-en Ign:7 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main amd64 Packages Ign:8 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main i386 Packages Ign:9 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main all Packages Ign:10 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main Translation-de_DE Ign:11 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main Translation-de Ign:12 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main Translation-en Ign:7 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main amd64 Packages Ign:8 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main i386 Packages Ign:9 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main all Packages Ign:10 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main Translation-de_DE Ign:11 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main Translation-de Ign:12 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main Translation-en Ign:7 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main amd64 Packages Ign:8 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main i386 Packages Ign:9 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main all Packages Ign:10 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main Translation-de_DE Ign:11 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main Translation-de Ign:12 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main Translation-en Fehl:7 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main amd64 Packages 404 Not Found Ign:8 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main i386 Packages Ign:9 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main all Packages Ign:10 https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu artful/main Translation-de_DE Paketlisten werden gelesen... Fertig W: The repository 'http://ppa.launchpad.net.ipv6.sixxs.org/costamagnagianfranco/borgbackup/ubuntu artful Release' does not have a Release file. N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. N: See apt-secure(8) manpage for repository creation and user configuration details. E: Fehlschlag beim Holen von https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu/dists/artful/main/binary-amd64/Packages 404 Not Found E: Fehlschlag beim Holen von https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu/dists/artful/main/i18n/Translation-de 404 Not Found E: Fehlschlag beim Holen von https://www.sixxs.net/costamagnagianfranco/borgbackup/ubuntu/dists/artful/main/i18n/Translation-en 404 Not Found E: Einige Indexdateien konnten nicht heruntergeladen werden. Sie wurden ignoriert oder alte an ihrer Stelle benutzt. Can you please add native IPV6 support? It's not that hard and should be available in 2018.