Fix GTK theme not applying in some scenarios

hosts/desktop.nix

@@ -32,6 +32,12 @@ in
 
   environment.systemPackages = with pkgs; [ yubioath-flutter ];
 
+  environment.sessionVariables = {
+    # GTK Theme won't display with GTK4 (e.g. nautilus) otherwise
+    # Doesn't work in some scenarios, such as open containing folder in Firefox, when declared in home.sessionVariables
+    GTK_THEME = (colors.gtkTheme pkgs).name;
+  };
+
   # Enable OpenTabletDriver, GUI configurator is otd-gui
   hardware.opentabletdriver.enable = true;
 

hosts/home.nix

@@ -55,11 +55,6 @@ in
 
     stateVersion = "22.05";
 
-    sessionVariables = {
-      # GTK Theme won't display with GTK4 (e.g. nautilus) otherwise
-      GTK_THEME = (colors.gtkTheme pkgs).name;
-    };
-
     packages = with pkgs; [
       # Command line utilities
       wget