As packaged in Guix, git-annex reads the file /etc/protocols, e.g. for accessing Web remotes. This requires sharing this file from the host when running git-annex in a container. Other software in Guix is patched to use the protocols file from "net-base" instead. This should be done for git-annex as well.
A quick scan of the source code shows no obvious reference to /etc/protocols. It is possible that the access actually happens in some dependency. Cheers, Konrad.
