Also, while doing that, using the guix binary 1.1.0 tarball from the website and
issuing guix pull (ONLY), a lot of weird stuff is updated, like libx11, fribidi,
graphviz, cairo, pixman, libjpeg-turbo, pango etc.  Is that really necessary?
I guess it's because of the profile hooks, but still... why.

I want to stress that the profile I'm building contains only guix, the package
manager.  Does that really need all those (presumably build-) dependencies?