Actually the info page is properly linked:

--8<---------------cut here---------------start------------->8---
> ls -l ~/.guix-profile/share/info/guile*
lrwxrwxrwx  41 root           root           94 1970-01-01  1970 /home/ambrevar/.guix-profile/share/info/guile-opengl.info.gz -> /gnu/store/2q9dsbdsq7i749ys781c37mln6x14lj7-guile-opengl-0.1.0/share/info/guile-opengl.info.gz
lrwxrwxrwx  41 root           root           88 1970-01-01  1970 /home/ambrevar/.guix-profile/share/info/guile-sdl.info.gz -> /gnu/store/sbqpqq3c75rhg0z47xwhffah2km4kyg2-guile-sdl-0.5.2/share/info/guile-sdl.info.gz
lrwxrwxrwx   2 root           root           90 1970-01-01  1970 /home/ambrevar/.guix-profile/share/info/guile-sdl2.info.gz -> /gnu/store/887637cqmnjh9z1dahq9km43g4xmm5ip-guile-sdl2-0.2.0/share/info/guile-sdl2.info.gz
lrwxrwxrwx  72 root           root           82 1970-01-01  1970 /home/ambrevar/.guix-profile/share/info/guile.info-1.gz -> /gnu/store/b90y3swxlx3vw2yyacs8cz59b8cbpbw5-guile-2.2.3/share/info/guile.info-1.gz
[...]
--8<---------------cut here---------------end--------------->8---

But ~/.guix-profile/share/info/dir points to a /gnu/store item which
does not contain either guile-sdl2 nor guile-opengl.  guile-sdl is fine though.

How could this possibly happen?  Re-installing the package does not
solve the issue.
Any idea?

-- 
Pierre Neidhardt