title: Flutter : iOS build failed
body: <p>I'm new to iOS development using flutter and just recently switch from android to iOS in flutter.</p>
  <p>I got below error when the project was run for first time in mac, it does not gives any error on Android and runs successfully.</p>
  <pre><code>Failed to build iOS app
  Error output from Xcode build:
  ↳
      2022-03-19 11:43:32.804 xcodebuild[9398:77766] Requested but did not find extension point with identifier
      Xcode.IDEKit.ExtensionSentinelHostApplications for extension Xcode.DebuggerFoundation.AppExtensionHosts.watchOS of plug-in
      com.apple.dt.IDEWatchSupportCore
      2022-03-19 11:43:32.804 xcodebuild[9398:77766] Requested but did not find extension point with identifier
      Xcode.IDEKit.ExtensionPointIdentifierToBundleIdentifier for extension
      Xcode.DebuggerFoundation.AppExtensionToBundleIdentifierMap.watchOS of plug-in com.apple.dt.IDEWatchSupportCore
      ** BUILD FAILED **
  
  
  Xcode's output:
  ↳
      Writing result bundle at path:
          /var/folders/7x/7bvzz8356b79dpq_bq4cr_p40000gp/T/flutter_tools.YZ6rQ9/flutter_ios_build_temp_dirYwEDOD/temporary_xcresult_b
          undle
  
      /Users/icebit-imac3/flutter/.pub-cache/hosted/pub.dartlang.org/location-4.3.0/ios/Classes/LocationPlugin.m:176:13: warning:
      'UIAlertView' is deprecated: first deprecated in iOS 9.0 - UIAlertView is deprecated. Use UIAlertController with a
      preferredStyle of UIAlertControllerStyleAlert instead [-Wdeprecated-declarations]
                  UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@&quot;Location is Disabled&quot;
                  ^
      In module 'UIKit' imported from /Users/icebit-imac3/gem_client/ios/Pods/Target Support Files/location/location-prefix.pch:2:
      /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator15.4.sdk/System/
      Library/Frameworks/UIKit.framework/Headers/UIAlertView.h:27:12: note: 'UIAlertView' has been explicitly marked deprecated
      here
      @interface UIAlertView : UIView
                 ^
      /Users/icebit-imac3/flutter/.pub-cache/hosted/pub.dartlang.org/location-4.3.0/ios/Classes/LocationPlugin.m:176:48: warning:
      'UIAlertView' is deprecated: first deprecated in iOS 9.0 - UIAlertView is deprecated. Use UIAlertController with a
      preferredStyle of UIAlertControllerStyleAlert instead [-Wdeprecated-declarations]
                  UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@&quot;Location is Disabled&quot;
                                                     ^
      In module 'UIKit' imported from /Users/icebit-imac3/gem_client/ios/Pods/Target Support Files/location/location-prefix.pch:2:
      /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator15.4.sdk/System/
      Library/Frameworks/UIKit.framework/Headers/UIAlertView.h:27:12: note: 'UIAlertView' has been explicitly marked deprecated
      here
      @interface UIAlertView : UIView
                 ^
      2 warnings generated.
      2 warnings generated.
      No file or variants found for asset: .env.
      Failed to package /Users/icebit-imac3/gem_client.
      Command PhaseScriptExecution failed with a nonzero exit code
      note: Using new build system
      note: Planning
      note: Build preparation complete
      note: Building targets in dependency order
      /Users/icebit-imac3/gem_client/ios/Pods/Pods.xcodeproj: warning: The iOS Simulator deployment target
      'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 15.4.99. (in
      target 'ReachabilitySwift' from project 'Pods')
  
      Result bundle written to path:
          /var/folders/7x/7bvzz8356b79dpq_bq4cr_p40000gp/T/flutter_tools.YZ6rQ9/flutter_ios_build_temp_dirYwEDOD/temporary_xcresult_b
          undle
  
  
  Could not build the application for the simulator.
  Error launching application on iPhone 11.
  </code></pre>
  <p>Also tried,</p>
  <ul>
  <li>pod install</li>
  <li>iOS folder recreate using <code>flutter create</code></li>
  </ul>
  <p>but nothing works</p>
  <p>Edit :</p>
  <p>After setting <code>IPHONEOS_DEPLOYMENT_TARGET</code> to 9.0, gives below output,</p>
  <pre><code>Failed to build iOS app
  Error output from Xcode build:
  ↳
      2022-03-19 12:53:28.631 xcodebuild[12230:115576] Requested but did not find extension point with identifier
      Xcode.IDEKit.ExtensionSentinelHostApplications for extension Xcode.DebuggerFoundation.AppExtensionHosts.watchOS of plug-in
      com.apple.dt.IDEWatchSupportCore
      2022-03-19 12:53:28.631 xcodebuild[12230:115576] Requested but did not find extension point with identifier
      Xcode.IDEKit.ExtensionPointIdentifierToBundleIdentifier for extension
      Xcode.DebuggerFoundation.AppExtensionToBundleIdentifierMap.watchOS of plug-in com.apple.dt.IDEWatchSupportCore
      ** BUILD FAILED **
  
  
  Xcode's output:
  ↳
      Writing result bundle at path:
          /var/folders/7x/7bvzz8356b79dpq_bq4cr_p40000gp/T/flutter_tools.lDNtig/flutter_ios_build_temp_dirjdf2tt/temporary_xcresult_b
          undle
  
      No file or variants found for asset: .env.
      Failed to package /Users/icebit-imac3/gem_client.
      Command PhaseScriptExecution failed with a nonzero exit code
      note: Using new build system
      note: Planning
      note: Build preparation complete
      note: Building targets in dependency order
  
      Result bundle written to path:
          /var/folders/7x/7bvzz8356b79dpq_bq4cr_p40000gp/T/flutter_tools.lDNtig/flutter_ios_build_temp_dirjdf2tt/temporary_xcresult_b
          undle
  
  
  Could not build the application for the simulator.
  Error launching application on iPhone 11.
  </code></pre>