diff --git a/pkgs/applications/editors/vscode/extensions/default.nix b/pkgs/applications/editors/vscode/extensions/default.nix
index 2052765841756..f99f42b4fcf9f 100644
--- a/pkgs/applications/editors/vscode/extensions/default.nix
+++ b/pkgs/applications/editors/vscode/extensions/default.nix
@@ -3481,22 +3481,6 @@ let
         };
       };
 
-      ms-vscode.theme-tomorrowkit = buildVscodeMarketplaceExtension {
-        mktplcRef = {
-          name = "Theme-TomorrowKit";
-          publisher = "ms-vscode";
-          version = "0.1.4";
-          hash = "sha256-qakwJWak+IrIeeVcMDWV/fLPx5M8LQGCyhVt4TS/Lmc=";
-        };
-        meta = {
-          description = "Additional Tomorrow and Tomorrow Night themes for VS Code. Based on the TextMate themes";
-          downloadPage = "https://marketplace.visualstudio.com/items?itemName=ms-vscode.Theme-TomorrowKit";
-          homepage = "https://github.com/microsoft/vscode-themes";
-          license = lib.licenses.mit;
-          maintainers = [ lib.maintainers.ratsclub ];
-        };
-      };
-
       ms-vscode-remote.remote-containers = buildVscodeMarketplaceExtension {
         mktplcRef = {
           name = "remote-containers";
@@ -5621,6 +5605,7 @@ let
     mgt19937.typst-preview = throw "The features of 'typst-preview' have been consolidated to 'tinymist', an all-in-one language server for typst"; # Added 2024-07-07
     ms-vscode.go = throw "ms-vscode.go is deprecated in favor of golang.go"; # Added 2024-05-29
     ms-vscode.PowerShell = throw "ms-vscode.PowerShell is deprecated in favor of super.ms-vscode.powershell"; # Added 2024-05-29
+    ms-vscode.theme-tomorrowkit = throw "ms-vscode.theme-tomorrowkit is deprecated"; # Added 2025-08-30
     rioj7.commandOnAllFiles = throw "rioj7.commandOnAllFiles is deprecated in favor of rioj7.commandonallfiles"; # Added 2024-05-29
     WakaTime.vscode-wakatime = throw "WakaTime.vscode-wakatime is deprecated in favor of wakatime.vscode-wakatime"; # Added 2024-05-29
   };