Hello! I am running Guix as a supplementary package manager on openSUSE 
Leap 15.4, and have used it to install the GTK3 XMMP client Dino (package 
‘dino’, version 0.3.1). The program seems to work fine, but some icons don’t 
show up in the graphical user interface. Some of them do (plus symbol, 
hamburger menu, security lock), but other show a placeholder instead (phone 
call), while some of them don’t show up at all (checkboxes, window control 
buttons, i.e. maximise, minimise, close). Please see the attached pictures 
(‘chat.png’ and ‘settings.png’) for reference.

Here is the terminal ouput after running ‘dino’:

  Gtk-Message: 17:06:11.398: Failed to load module "colorreload-gtk-module"
  Gtk-Message: 17:06:11.398: Failed to load module "window-decorations-gtk-
module"
  Gtk-Message: 17:06:11.398: Failed to load module "appmenu-gtk-module"
  
  ** (dino:17647): CRITICAL **: 17:06:11.642: file /tmp/guix-build-
dino-0.3.1.drv-0/dino-0.3.1/main/src/ui/main_window.vala: line 68: uncaught 
error: Unrecognized image file format (gdk-pixbuf-error-quark, 3)
  
  (dino:17647): Gtk-WARNING **: 17:06:11.676: Found an icon but could not load 
it. Most likely gdk-pixbuf does not provide SVG support.
  
  (dino:17647): Gtk-WARNING **: 17:06:11.680: Could not load a pixbuf from 
icon theme.
  This may indicate that pixbuf loaders or the mime database could not be 
found.

Here is the output of ‘guix describe’:

  guix describe
  Generation 4    pro 17 2022 14:18:38    (current)
    guix 491bddf
      repository URL: https://git.savannah.gnu.org/git/guix.git
      branch: master
      commit: 491bddfa276cc9775adf325c07e5f82638f330e7

Guix usually tries to tell me when I have to do extra steps after installing a 
package, but it says nothing this time around, so I presume this is a bug. Any 
help would be appreciated!

Best of wishes
// Tirifto