This lack of ports mirrors in choose-mirror is still an issue. Just ran into the problem on the sparc64 port.
I submitted a merge request for your patch here: https://salsa.debian.org/installer-team/choose-mirror/merge_requests/1
- Bug#879130: (no subject) Gregor Riepl
- Bug#879130: choose-mirror: empty mirror li... Samuel Thibault
- Bug#879130: choose-mirror: empty mirro... Samuel Thibault
- Bug#879130: choose-mirror: empty m... Samuel Thibault
- Processed: Re: Bug#879130: cho... Debian Bug Tracking System
