Let's try to theme like this then

home-manager/desktop/default.nix

@@ -89,7 +89,10 @@
 
     # Theming:
     catppuccin-cursors
-    catppuccin-kde
+    (catppuccin-kde.override {
+      flavour = "macchiato";
+      accents = "lavender";
+    })
     catppuccin-sddm-corners
 
     # Web browsing:
@@ -103,7 +106,17 @@
     extensions = with pkgs.vscode-extensions; [
       #arrterian.nix-env-selector
       #ban.spellright
-      catppuccin.catppuccin-vsc
+      (pkgs.catppuccin-vsc.override {
+        accent = "lavender";
+        boldKeywords = true;
+        italicComments = true;
+        italicKeywords = true;
+        extraBordersEnabled = false;
+        workbenchMode = "default";
+        bracketMode = "rainbow";
+        colorOverrides = {};
+        customUIColors = {};
+      })
       catppuccin.catppuccin-vsc-icons
       charliermarsh.ruff
       # dracula-theme.theme-dracula

home-manager/hosts/shodan/lillian.nix

@@ -76,7 +76,10 @@
 
     # Theming:
     catppuccin-cursors
-    catppuccin-kde
+    (catppuccin-kde.override {
+      flavour = "macchiato";
+      accents = "lavender";
+    })
     catppuccin-plymouth
     catppuccin-sddm-corners
 

overlays/default.nix

@@ -7,10 +7,6 @@
     # steam = prev.steam.override {
     #   extraProfile = ''export LD_PRELOAD=${inputs.extest}/lib/libextest.so:$LD_PRELOAD'';
     # };
-    catppuccin-kde = prev.catppuccin-kde.prev.steam.override {
-      flavour = ["macchiato"];
-      accents = ["lavender"];
-    };
   };
 
   # This one brings our custom packages from the 'pkgs' directory