@Mehrad @civodul Building a Debian+Guix image takes around 25 minutes on a large GitLab runner node. Building the pure Guix image takes around 6 minutes, also on a large GitLab runner node. The Debian+Guix image is used to prepare the native Guix-only image. I have not yet tried to build another Guix-only image from the Guix-only image I have prepared, that is issue #1 and I think it is trivial. https://gitlab.com/debdistutils/guix/container/-/issues/1