diff --git a/pigeon.sh b/pigeon.sh
deleted file mode 100755
index 972f11e..0000000
--- a/pigeon.sh
+++ /dev/null
@@ -1,23 +0,0 @@
-# UserDefaults for iOS
-dart run pigeon \
-    --input api/user_defaults.dart \
-    --dart_out lib/api/user_defaults.dart \
-    --swift_out ios/Classes/UserDefaultsAPI.swift
-
-# UserDefaults for macOS
-dart run pigeon \
-    --input api/user_defaults.dart \
-    --dart_out lib/api/user_defaults.dart \
-    --swift_out macos/Classes/UserDefaultsAPI.swift
-
-# WidgetKit for iOS
-dart run pigeon \
-    --input api/widget_kit.dart \
-    --dart_out lib/api/widget_kit.dart \
-    --swift_out ios/Classes/WidgetKitAPI.swift
-
-# WidgetKit for macOS
-dart run pigeon \
-    --input api/widget_kit.dart \
-    --dart_out lib/api/widget_kit.dart \
-    --swift_out macos/Classes/WidgetKitAPI.swift
diff --git a/tool/gen_pigeon.dart b/tool/gen_pigeon.dart
new file mode 100644
index 0000000..f0f7902
--- /dev/null
+++ b/tool/gen_pigeon.dart
@@ -0,0 +1,51 @@
+// ignore_for_file: avoid_print
+
+import 'dart:io';
+
+Future<void> runPigeon(String input, String dartOut, String swiftOut) async {
+  var result = await Process.run('dart', [
+    'run',
+    'pigeon',
+    '--input',
+    input,
+    '--dart_out',
+    dartOut,
+    '--swift_out',
+    swiftOut
+  ]);
+
+  if (result.exitCode != 0) {
+    print('Error running pigeon:\n${result.stderr}');
+    exit(result.exitCode);
+  }
+}
+
+void main() async {
+  // UserDefaults for iOS
+  await runPigeon(
+    'api/user_defaults.dart',
+    'lib/api/user_defaults.dart',
+    'ios/Classes/UserDefaultsAPI.swift',
+  );
+
+  // UserDefaults for macOS
+  await runPigeon(
+    'api/user_defaults.dart',
+    'lib/api/user_defaults.dart',
+    'macos/Classes/UserDefaultsAPI.swift',
+  );
+
+  // WidgetKit for iOS
+  await runPigeon(
+    'api/widget_kit.dart',
+    'lib/api/widget_kit.dart',
+    'ios/Classes/WidgetKitAPI.swift',
+  );
+
+  // WidgetKit for macOS
+  await runPigeon(
+    'api/widget_kit.dart',
+    'lib/api/widget_kit.dart',
+    'macos/Classes/WidgetKitAPI.swift',
+  );
+}