diff --git a/package.json b/package.json
index c6c127e35b..d5f17c68d4 100644
--- a/package.json
+++ b/package.json
@@ -106,6 +106,7 @@
     "@types/react-dom": "^19.2.0",
     "@types/shell-quote": "^1.7.5",
     "@types/ws": "^8.18.1",
+    "@typescript/native-preview": "^7.0.0-dev.20260412.1",
     "@vitest/coverage-v8": "^3.1.1",
     "@vitest/eslint-plugin": "^1.3.4",
     "asciichart": "^1.5.25",
diff --git a/scripts/build.js b/scripts/build.js
index 888f1ffeac..0c2d16a334 100644
--- a/scripts/build.js
+++ b/scripts/build.js
@@ -23,7 +23,6 @@ if (!existsSync(join(root, 'node_modules'))) {
 const workspaces = [
   '@google/gemini-cli-test-utils',
   '@google/gemini-cli-core',
-  '@google/gemini-cli-a2a-server',
   '@google/gemini-cli',
   'gemini-cli-vscode-ide-companion',
 ];
diff --git a/scripts/build_package.js b/scripts/build_package.js
index 279e46fa94..6f97f3500a 100644
--- a/scripts/build_package.js
+++ b/scripts/build_package.js
@@ -29,7 +29,7 @@ if (!process.cwd().includes('packages')) {
 const packageName = basename(process.cwd());
 
 // build typescript files
-execSync('tsc --build', { stdio: 'inherit' });
+execSync('tsgo --build', { stdio: 'inherit' });
 
 // Run package-specific bundling if the script exists
 const bundleScript = join(process.cwd(), 'scripts', 'bundle-browser-mcp.mjs');