bug#47713: Icecat doesnt show numbers for anything

[bo0od]

> Is this on Guix System or on another distro?

only reporting issues against guix in its own distro (guixsd). (i will 
mention if im reporting guix when used on another distro)

> 
https://guix.gnu.org/manual/en/html_node/Application-Setup.html#X11-Fonts

done this step:

```
guix install fontconfig
fc-cache -rv
```

same issue.

Ludovic Courtès:
> Hi,
>
> bo0od <bo0od@riseup.net> skribis:
>
> > Icecat doesnt show/identify any number (seems to be) inside
> > itself. (Check the uploaded images)
>
> Is this on Guix System or on another distro?
>
> In the latter case, see:
>
>    https://guix.gnu.org/manual/en/html_node/Application-Setup.html#X11-Fonts
>
> HTH,
> Ludo’.