Ludo,

>> Does simply adding ‘hicolor-icon-theme’ to ‘inputs’ fix the issue?
> 
> Most gtk-based apps expect hicolor-icon-theme and adwaita-icon-theme to be in the profile. Adding these in either system or user profile would prevent this error from occurring.
> 
>> Unfortunately, Gajim fails to build for me as described in
>> <https://dev.gajim.org/gajim/gajim/-/issues/10478>.
>>
>> Raghav, what should we do about it? The issue above is closed, but are
>> we missing the fix?
> 
> That's odd. The upstream removed those obsolete test files which were causing the build failure. Could you please confirm the commit and system-architecture you tried to build on?

It appears the build fails on CI too 
[https://ci.guix.gnu.org/build/1099363/log/raw]. This time its a 
different test that is failing. But same as before, it passes on my 
machine and probably passes on some other machines too. Pushed the fix 
as commit 	29980098508e1e23a767a7c91fe27f0478418eb2, and reported the 
bug upstream.

Regards,
RG.