diff --git a/ios/Podfile b/ios/Podfile
index 5a40e0f6a..28d4c2f7d 100644
--- a/ios/Podfile
+++ b/ios/Podfile
@@ -45,6 +45,27 @@ post_install do |installer|
     # Ensure all pods use the same iOS deployment target
     target.build_configurations.each do |config|
       config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '18.0'
+      config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= [
+        '$(inherited)',
+
+        ## dart: PermissionGroup.microphone
+        'PERMISSION_MICROPHONE=1',
+
+        ## dart: PermissionGroup.notification
+        'PERMISSION_NOTIFICATIONS=1',
+
+        ## dart: PermissionGroup.calendar
+        'PERMISSION_EVENTS=1',
+        
+        ## dart: PermissionGroup.calendarFullAccess
+        'PERMISSION_EVENTS_FULL_ACCESS=1',
+
+        'PERMISSION_LOCATION=1',
+        'PERMISSION_LOCATION_WHENINUSE=0',
+
+        ## dart: PermissionGroup.bluetooth
+        'PERMISSION_BLUETOOTH=1',
+      ]
     end
   end
 end