Get QT theme somewhat working

home/default.nix

@@ -11,10 +11,10 @@
       ./fish.nix
       ./git.nix
       ./gpg.nix
-      ./gtk.nix
       ./mpv.nix
       ./ssh
       ./terminals.nix
+      ./theme.nix
       ./tmux.nix
       ./use-xdg.nix
     ];

home/gtk.nix

@@ -1,14 +0,0 @@
-{ ... }:
-let
-  common-gtk = {
-    gtk-application-prefer-dark-theme = true;
-  };
-in
-{
-  home.sessionVariables.GTK_THEME = "Adwaita:dark";
-  gtk = {
-    enable = true;
-    gtk3.extraConfig = common-gtk;
-    gtk4.extraConfig = common-gtk;
-  };
-}

home/theme.nix

@@ -0,0 +1,51 @@
+{ pkgs, lib, ... }:
+let
+  ini = pkgs.formats.ini { };
+  common-gtk = {
+    gtk-application-prefer-dark-theme = true;
+  };
+  qtct-config =
+    pkg: name:
+    ini.generate "${name}.conf" {
+      Appearance = {
+        custom_palette = true;
+        color_scheme_path = "${pkg}/share/${name}/colors/darker.conf";
+
+        style = "Breeze";
+        icon_theme = "breeze-dark";
+
+        standard_dialogs = "default";
+      };
+    };
+in
+{
+  home.sessionVariables.GTK_THEME = "Adwaita:dark";
+  gtk = {
+    enable = true;
+    gtk3.extraConfig = common-gtk;
+    gtk4.extraConfig = common-gtk;
+  };
+
+  dconf.settings = {
+    "org/gnome/desktop/interface" = {
+      color-scheme = "prefer-dark";
+    };
+  };
+
+  qt = {
+    enable = true;
+    platformTheme.name = "qtct";
+  };
+
+  home.packages = with pkgs; [
+    (lib.lowPrio libsForQt5.breeze-qt5.bin)
+    kdePackages.breeze
+    kdePackages.breeze-icons
+    qt6.qtwayland
+  ];
+
+  xdg.configFile = {
+    "qt5ct/qt5ct.conf".source = qtct-config pkgs.libsForQt5.qt5ct "qt5ct";
+    "qt6ct/qt6ct.conf".source = qtct-config pkgs.kdePackages.qt6ct "qt6ct";
+  };
+}

sets/workstation.nix

@@ -64,10 +64,5 @@
     };
   };
 
-  qt = {
-    enable = true;
-    platformTheme = "qt5ct";
-  };
-
   users.users.artemis.extraGroups = [ "scanner" ];
 }