nixos-config/system/home-manager/gtk.nix

{ lib, pkgs, ... }:

let commonGtkSettings.gtk-application-prefer-dark-theme = 1;
in {
  home.packages = with pkgs; [ dconf ];
  home.pointerCursor.gtk.enable = true;

  dconf = {
    enable = true;
    settings."org/gnome/desktop/interface".color-scheme = "prefer-dark";
  };

  gtk = {
    enable = true;
    iconTheme = {
      name = "Adwaita";
      package = pkgs.gnome.adwaita-icon-theme;
    };
    gtk2.extraConfig = lib.generators.toINIWithGlobalSection { } {
      globalSection = commonGtkSettings;
      sections = { };
    };
    gtk3.extraConfig = commonGtkSettings;
    gtk4.extraConfig = commonGtkSettings;
  };
}