-ARCHIVE_KEYRING=/usr/share/keyrings/debian-archive-keyring.gpg
-REMOVED_KEYS=/usr/share/keyrings/debian-archive-removed-keys.gpg
+# ubuntu keyrings
+MASTER_KEYRING=/usr/share/keyrings/ubuntu-master-keyring.gpg
+ARCHIVE_KEYRING=/usr/share/keyrings/ubuntu-archive-keyring.gpg
+REMOVED_KEYS=/usr/share/keyrings/ubuntu-archive-removed-keys.gpg
+ARCHIVE_KEYRING_URI=http://archive.ubuntu.com/ubuntu/project/ubuntu-archive-keyring.gpg
+