diff --git a/pkgs/applications/editors/vscode/extensions/default.nix b/pkgs/applications/editors/vscode/extensions/default.nix
index cf91adbc27df..04e0f0a87a76 100644
--- a/pkgs/applications/editors/vscode/extensions/default.nix
+++ b/pkgs/applications/editors/vscode/extensions/default.nix
@@ -2843,6 +2843,7 @@ let
 
       ms-ceintl = callPackage ./language-packs.nix { }; # non-English language packs
 
+      ms-dotnettools.csdevkit = callPackage ./ms-dotnettools.csdevkit { };
       ms-dotnettools.csharp = callPackage ./ms-dotnettools.csharp { };
 
       ms-kubernetes-tools.vscode-kubernetes-tools = buildVscodeMarketplaceExtension {
diff --git a/pkgs/applications/editors/vscode/extensions/ms-dotnettools.csdevkit/default.nix b/pkgs/applications/editors/vscode/extensions/ms-dotnettools.csdevkit/default.nix
new file mode 100644
index 000000000000..9a198ddd750d
--- /dev/null
+++ b/pkgs/applications/editors/vscode/extensions/ms-dotnettools.csdevkit/default.nix
@@ -0,0 +1,117 @@
+{ lib
+, icu
+, openssl
+, patchelf
+, stdenv
+, vscode-utils
+}:
+let
+  inherit (stdenv.hostPlatform) system;
+  inherit (vscode-utils) buildVscodeMarketplaceExtension;
+
+  extInfo = {
+    x86_64-linux = {
+      arch = "linux-x64";
+      sha256 = "sha256-7m85Zl9oV40le3nkNPzoKu/AAf8XhQpI8sBMsQXmBg8=";
+      binaries = [
+        "components/vs-green-server/platforms/linux-x64/node_modules/@microsoft/servicehub-controller-net60.linux-x64/Microsoft.ServiceHub.Controller"
+        "components/vs-green-server/platforms/linux-x64/node_modules/@microsoft/visualstudio-code-servicehost.linux-x64/Microsoft.VisualStudio.Code.ServiceHost"
+        "components/vs-green-server/platforms/linux-x64/node_modules/@microsoft/visualstudio-reliability-monitor.linux-x64/Microsoft.VisualStudio.Reliability.Monitor"
+        "components/vs-green-server/platforms/linux-x64/node_modules/@microsoft/visualstudio-server.linux-x64/Microsoft.VisualStudio.Code.Server"
+      ];
+    };
+    aarch64-linux = {
+      arch = "linux-arm64";
+      sha256 = "sha256-39D55EdwE4baDYbHc9GD/1XoxGbQkUkS1H2uysJHlxw=";
+      binaries = [
+        "components/vs-green-server/platforms/linux-arm64/node_modules/@microsoft/servicehub-controller-net60.linux-arm64/Microsoft.ServiceHub.Controller"
+        "components/vs-green-server/platforms/linux-arm64/node_modules/@microsoft/visualstudio-code-servicehost.linux-arm64/Microsoft.VisualStudio.Code.ServiceHost"
+        "components/vs-green-server/platforms/linux-arm64/node_modules/@microsoft/visualstudio-reliability-monitor.linux-arm64/Microsoft.VisualStudio.Reliability.Monitor"
+        "components/vs-green-server/platforms/linux-arm64/node_modules/@microsoft/visualstudio-server.linux-arm64/Microsoft.VisualStudio.Code.Server"
+      ];
+    };
+    x86_64-darwin = {
+      arch = "darwin-x64";
+      sha256 = "sha256-gfhJX07R+DIw9FbzaEE0JZwEmDeifiq4vHyMHZZ1udM=";
+      binaries = [
+        "components/vs-green-server/platforms/darwin-x64/node_modules/@microsoft/servicehub-controller-net60.darwin-x64/Microsoft.ServiceHub.Controller"
+        "components/vs-green-server/platforms/darwin-x64/node_modules/@microsoft/visualstudio-code-servicehost.darwin-x64/Microsoft.VisualStudio.Code.ServiceHost"
+        "components/vs-green-server/platforms/darwin-x64/node_modules/@microsoft/visualstudio-reliability-monitor.darwin-x64/Microsoft.VisualStudio.Reliability.Monitor"
+        "components/vs-green-server/platforms/darwin-x64/node_modules/@microsoft/visualstudio-server.darwin-x64/Microsoft.VisualStudio.Code.Server"
+      ];
+    };
+    aarch64-darwin = {
+      arch = "darwin-arm64";
+      sha256 = "sha256-vogstgCWvI9csNF9JfJ41XPR1POy842g2yhWqIDoHLw=";
+      binaries = [
+        "components/vs-green-server/platforms/darwin-arm64/node_modules/@microsoft/servicehub-controller-net60.darwin-arm64/Microsoft.ServiceHub.Controller"
+        "components/vs-green-server/platforms/darwin-arm64/node_modules/@microsoft/visualstudio-code-servicehost.darwin-arm64/Microsoft.VisualStudio.Code.ServiceHost"
+        "components/vs-green-server/platforms/darwin-arm64/node_modules/@microsoft/visualstudio-reliability-monitor.darwin-arm64/Microsoft.VisualStudio.Reliability.Monitor"
+        "components/vs-green-server/platforms/darwin-arm64/node_modules/@microsoft/visualstudio-server.darwin-arm64/Microsoft.VisualStudio.Code.Server"
+      ];
+    };
+  }.${system} or (throw "Unsupported system: ${system}");
+in
+buildVscodeMarketplaceExtension {
+  mktplcRef = {
+    name = "csdevkit";
+    publisher = "ms-dotnettools";
+    version = "1.4.28";
+    inherit (extInfo) sha256 arch;
+  };
+  sourceRoot = "extension"; # This has more than one folder.
+
+  nativeBuildInputs = [
+    patchelf
+  ];
+
+  postPatch = ''
+    declare ext_unique_id
+    ext_unique_id="$(basename "$out" | head -c 32)"
+
+    patchelf_add_icu_as_needed() {
+      declare elf="''${1?}"
+      declare icu_major_v="${
+      lib.head (lib.splitVersion (lib.getVersion icu.name))
+    }"
+
+      for icu_lib in icui18n icuuc icudata; do
+        patchelf --add-needed "lib''${icu_lib}.so.$icu_major_v" "$elf"
+      done
+    }
+
+    patchelf_common() {
+      declare elf="''${1?}"
+
+      patchelf_add_icu_as_needed "$elf"
+      patchelf --add-needed "libssl.so" "$elf"
+      patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" \
+        --set-rpath "${lib.makeLibraryPath [stdenv.cc.cc openssl icu.out]}:\$ORIGIN" \
+        "$elf"
+    }
+
+    substituteInPlace dist/extension.js \
+      --replace 'e.extensionPath,"cache"' 'require("os").tmpdir(),"'"$ext_unique_id"'"' \
+      --replace 't.setExecuteBit=async function(e){if("win32"!==process.platform){const t=i.join(e[a.SERVICEHUB_CONTROLLER_COMPONENT_NAME],"Microsoft.ServiceHub.Controller"),n=i.join(e[a.SERVICEHUB_HOST_COMPONENT_NAME],(0,a.getServiceHubHostEntrypointName)()),r=[(0,a.getServerPath)(e),t,n,(0,c.getReliabilityMonitorPath)(e)];await Promise.all(r.map((e=>(0,o.chmod)(e,"0755"))))}}' 't.setExecuteBit=async function(e){}'
+
+  ''
+  + (lib.concatStringsSep "\n" (map
+    (bin: ''
+      chmod +x "${bin}"
+    '')
+    extInfo.binaries))
+  + lib.optionalString stdenv.isLinux (lib.concatStringsSep "\n" (map
+    (bin: ''
+      patchelf_common "${bin}"
+    '')
+    extInfo.binaries));
+
+  meta = {
+    changelog = "https://marketplace.visualstudio.com/items/ms-dotnettools.csdevkit/changelog";
+    description = "The official Visual Studio Code extension for C# from Microsoft";
+    downloadPage = "https://marketplace.visualstudio.com/items?itemName=ms-dotnettools.csdevkit";
+    license = lib.licenses.unfree;
+    maintainers = [ lib.maintainers.ggg ];
+    platforms = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
+  };
+}