anchor.diff:    flutterTools =
       lib.optionalAttrs (includeFlutter) { inherit (pkgs) flutter git; };
   
  -  flutterAndroidTools = { inherit (pkgs) androidsdk jdk; };
  +  flutterAndroidTools = { inherit (pkgs) android-studio androidsdk jdk; };
   
     flutterIosTools = { }
       lib.optionalAttrs(stdenv.isDarwin) { inherit (pkgs) cocoapods; };
  
positive.code:   shellHook = lib.optionalString (targetAndroid) ''
      export ANDROID_HOME="${pkgs.androidsdk}/libexec/android-sdk"
      export JAVA_HOME="${pkgs.jdk}"
    '';
  }
  
negative.code: # limitations under the License.
  
  { sources ? import ./sources.nix
  , includeFlutter ? true
  , targetAndroid ? true
  , targetIos ? false
  , targetDesktop ? false
  