Good day. I’m on NixOS 23.05 and found a strange issue where KDE (QT?) based apps don’t display many nerd-font glyphs properly, e.g. those suggested in the starship manual. It’s only in KDE/QT apps, and only on NixOS (KDE Neon / Kubuntu work fine)
The font I use is “MesloLGSDS Newd Front Mono”
Chrome displays them just fine as you can se below (at least I do)
💨🕙💦🦬🍞✨🦕🐋🔮🇬️🌱
GTK-based app have no issues as well. Here is tilix terminal for example:
But KDE/QT based stuff struggles. Here is how I see it in the console
I looks like NixOS-specific issues because it all works just find in KDE-neon running in Virtualbox (KDE 5.27 on Wayland)
And even on my old laptop with Kubuntu 20.04 LTS it works just fine as well.
Not sure if it’s a bug or configuration problem?
All I do in confugration.nix is
services.xserver.displayManager.defaultSession = "plasmawayland";
services.xserver.desktopManager.plasma5.enable = true;
Same issue happens with kate as well as any QT app (Dolphin, klipper, etc.)
hum… in my case, using jetbrains mono nerd font and noto color emoji:
What do you have as font setting on the last tab of the “appearence section” ? ( should be something like disposition of complex text, but dont know the string for sure because I have it on another language, not english )
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Wow! Somehow I completely missed that settings tab.
The emoji font there was set to “-1” which looked dodgy 
After setting it to Noto Color Emoji, 11pt, it all renders just fine!
(still some weird artifact in the dialog UI 
)
@aJWXSLWNVHRrz Thank you! Do you know how to make it work in other KDE apps? If I set system font to Noto Color Emoji it obviously work but that text itself looks way off.
Is that some kind of font-fallback mechanism that is not working?
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I’ve managed to get it working across KDE by applying font configuration as mentioned here: #86601 (comment).
Though I understand the concerns why it’s not the default, that was a hard one to dig out.
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Actually I didnt noticed other apps werent working
Thanks for digging deeper and finding the solution !
Yeah, finally when somebody puts an icon in the email subject and gmail puts it in the browser’s window title I can see the icon in the task manager
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