anchor.diff:  
   , # Whether to build dynamic libs for the standard library (on the target
     # platform). Static libs are always built.
  -  enableShared ? true
  +  enableShared ? !stdenv.targetPlatform.useiOSPrebuilt
   
   , # What flavour to build. An empty string indicates no
     # specific flavour and falls back to ghc default values.
  
positive.code:     inherit (ghc.meta) license platforms;
    };
  
  }
  
negative.code:   targetCC = builtins.head toolsForTarget;
  
  in
  stdenv.mkDerivation (rec {
    version = "8.2.2";
    name = "${targetPrefix}ghc-${version}";
  
  