diff --git a/src/core/bazel.test.ts b/src/core/bazel.test.ts
index 0090d83..d7bf22c 100644
--- a/src/core/bazel.test.ts
+++ b/src/core/bazel.test.ts
@@ -148,12 +148,12 @@ describe('Bazel argument helpers', () => {
     expect(modeArgs('release_with_symbols')).toEqual(['--config=ios_release', '--config=generate_dsym']);
 
     expect(platformArgs('none')).toEqual([]);
-    expect(platformArgs('simulator')).toEqual(['--ios_multi_cpus=sim_arm64']);
-    expect(platformArgs('device')).toEqual(['--ios_multi_cpus=arm64']);
-    expect(platformArgs('macos')).toEqual([]);
-    expect(platformArgs('tvos')).toEqual(['--tvos_cpus=sim_arm64']);
-    expect(platformArgs('watchos')).toEqual(['--watchos_cpus=arm64']);
-    expect(platformArgs('visionos')).toEqual(['--visionos_cpus=sim_arm64']);
+    expect(platformArgs('simulator')).toEqual(['--platforms=@build_bazel_apple_support//platforms:ios_sim_arm64', '--ios_multi_cpus=sim_arm64']);
+    expect(platformArgs('device')).toEqual(['--platforms=@build_bazel_apple_support//platforms:ios_arm64', '--ios_multi_cpus=arm64']);
+    expect(platformArgs('macos')).toEqual(['--platforms=@build_bazel_apple_support//platforms:darwin_arm64']);
+    expect(platformArgs('tvos')).toEqual(['--platforms=@build_bazel_apple_support//platforms:tvos_sim_arm64', '--tvos_cpus=sim_arm64']);
+    expect(platformArgs('watchos')).toEqual(['--platforms=@build_bazel_apple_support//platforms:watchos_arm64', '--watchos_cpus=arm64']);
+    expect(platformArgs('visionos')).toEqual(['--platforms=@build_bazel_apple_support//platforms:visionos_sim_arm64', '--visionos_cpus=sim_arm64']);
   });
 
   it('maps simulator and config options to Bazel flags', () => {
@@ -181,6 +181,7 @@ describe('Bazel argument helpers', () => {
     ).toEqual([
       'build',
       '--config=debug',
+      '--platforms=@build_bazel_apple_support//platforms:ios_sim_arm64',
       '--ios_multi_cpus=sim_arm64',
       '--ios_simulator_device=iPhone 16 Pro',
       '--config=local',
@@ -202,6 +203,7 @@ describe('Bazel argument helpers', () => {
     ).toEqual([
       'build',
       '--config=ios_release',
+      '--platforms=@build_bazel_apple_support//platforms:ios_arm64',
       '--ios_multi_cpus=arm64',
       '//:MyApp',
     ]);
diff --git a/src/core/bazel.ts b/src/core/bazel.ts
index e46b672..c8c5a5e 100644
--- a/src/core/bazel.ts
+++ b/src/core/bazel.ts
@@ -72,17 +72,17 @@ export function platformArgs(platform?: BuildPlatform): string[] {
     case 'none':
       return [];
     case 'simulator':
-      return ['--ios_multi_cpus=sim_arm64'];
+      return ['--platforms=@build_bazel_apple_support//platforms:ios_sim_arm64', '--ios_multi_cpus=sim_arm64'];
     case 'device':
-      return ['--ios_multi_cpus=arm64'];
+      return ['--platforms=@build_bazel_apple_support//platforms:ios_arm64', '--ios_multi_cpus=arm64'];
     case 'macos':
-      return [];
+      return ['--platforms=@build_bazel_apple_support//platforms:darwin_arm64'];
     case 'tvos':
-      return ['--tvos_cpus=sim_arm64'];
+      return ['--platforms=@build_bazel_apple_support//platforms:tvos_sim_arm64', '--tvos_cpus=sim_arm64'];
     case 'watchos':
-      return ['--watchos_cpus=arm64'];
+      return ['--platforms=@build_bazel_apple_support//platforms:watchos_arm64', '--watchos_cpus=arm64'];
     case 'visionos':
-      return ['--visionos_cpus=sim_arm64'];
+      return ['--platforms=@build_bazel_apple_support//platforms:visionos_sim_arm64', '--visionos_cpus=sim_arm64'];
     default: {
       const _exhaustive: never = p;
       throw new Error(`Unknown platform: ${_exhaustive}`);
diff --git a/src/tools/handlers/build.ts b/src/tools/handlers/build.ts
index ffd7987..5f0dcc3 100644
--- a/src/tools/handlers/build.ts
+++ b/src/tools/handlers/build.ts
@@ -81,7 +81,8 @@ export const definitions: ToolDefinition[] = [
         },
         platform: {
           type: 'string',
-          enum: ['none', 'simulator', 'device'],
+          enum: ['none', 'simulator', 'device', 'macos', 'tvos', 'watchos', 'visionos'],
+          description: 'Target platform. Use "simulator" for iOS sim, "device" for iOS device, "macos" for macOS, or "none" to skip platform flags.',
         },
         simulatorName: { type: 'string' },
         simulatorVersion: { type: 'string' },