It was the curtin-common package at fault. I had been under the mistaken impression that it was the ephemerals that needed to be updated, and we hadn't updated the packages on the server in a while. Once we did, it started working.
-- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to curtin in Ubuntu. https://bugs.launchpad.net/bugs/1383727 Title: [SRU] Fast installer - failure to install grub (UEFI mode) To manage notifications about this bug go to: https://bugs.launchpad.net/curtin/+bug/1383727/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
