guix pull: error: getting status of /var/guix/gcroots

[Jimmy Thrasibule <jimmy.thrasibule@gmail.com>]

Hi,

I'm building a Docker image in order to get a GuixSD by using the ``guix
system docker-image`` command. See the Dokerfile at:
https://bitbucket.org/x237net/guixsd/src/master/src/Dockerfile.

The process is working great and I can successfully get to the final result
on my local systems.

However, when I push the container to hub.docker.com it fails to build the
image with the following error message:


    guix pull: error: getting status of /var/guix/gcroots: Operation not
permitted


Again, I successfully built the image on different local systems and my
other container [x237net/alpine-guix] which builds successfully on their
platform also calls ``guix pull``.

I guess they are reducing the capabilities allowed to their build platform
but I can really tell what operation is guix pull attempting in this
particular case.

Regards,
Jimmy