I installed the GNU system using the Guix System 1.0 ISO installer and reconfigured the system to work around the installer "%base-packages" bug (https://debbugs.gnu.org/cgi/bugreport.cgi?bug=35541).
When I install the "ibus-anthy" input method, I don't find any way of using it because it is not listed in the GNOME input sources, nor in the list of input methods in IBus Preferences.
## Steps to reproduce
1. guix install ibus ibus-anthy font-adobe-source-han-sans
2. Go to "GNOME Settings → Language & Region"
3. In "Input Sources", click on the Add button (+)
4. In the list that appears, select "Japanese"
## Unexpected result
"Japanese (Anthy)" is not listed.
## Expected result
"Japanese (Anthy)" is listed.
Also, adding it to the list of Input Sources enables a new option to the right of the GNOME top bar where you can select the different Input Sources you have set. When you choose the newly added Japanese (Anthy) you can start writing Japanese right away. For example, typing "aiueo" would result in "?????".
Also, the keyboard combination Super+Space allows you to alternate between input sources
## Additional information
The Japanese (Anthy) input method is not listed in IBus preferences either. You can check by doing the following:
1. Click on Activities
2. Click on Show Applications
3. Click on IBus Preferences
4. Click on the Input Method tab
5. Click on the Add button
6. Click on Japanese
You should be able to see Anthy there, but it isn't.