That's awesome! Maybe I'll get a flashcart and play through it.

I tried this and was able to set a colorscheme in qt5/6ct that stuck in nheko (with QT_QPA_PLATFORMTHEME=qt5ct), but it still has the same icons issue in Dolphin. pcmanfm-qt also has the icons missing.

Agreed! I wonder how it will work if I have to reinstall, I guess I git clone my flake from the install CD and use that instead.

For Qt themes, I had Catppuccin working on Arch but I haven't found a way to apply it. I tried Stylix (kde.enable = true does nothing for Dolphin or nheko), the official Catppuccin flake (dropped GTK support, sets QT_STYLE_OVERRIDE which breaks nheko). I know it's possible to theme Qt apps because I've had it working before, but I can't find any info on how to do it with NixOS that works..

Thanks for the recommendation! Using it now, works great. Do you know whether development ia continued anywhere? It doesn't look to have been updated in many years, but F-Droid doesn't mark it as unmaintained.