anchor.diff:    haskellPlatformDefaults_2009_2_0_2 =
       self : self.haskellPlatformArgs_2009_2_0_2 self // {
         haskellPlatform = self.haskellPlatform_2009_2_0_2;
  +      extensibleExceptions = self.extensibleExceptions_0_1_1_0;
       };
   
     haskellPlatform_2009_2_0_2 =
  
positive.code:   Tensor = callPackage ../development/libraries/haskell/Tensor {};
  
    terminfo = callPackage ../development/libraries/haskell/terminfo {
      inherit (self) extensibleExceptions /* only required for <= ghc6102  ?*/;
      inherit (pkgs) ncurses;
    };
  
  
negative.code: 
    emgm = callPackage ../development/libraries/haskell/emgm {};
  
    extensibleExceptions_0_1_1_0 = callPackage ../development/libraries/haskell/extensible-exceptions {};
    extensibleExceptions = null; # a core package in recent GHCs
  
    failure = callPackage ../development/libraries/haskell/failure {};
  
  