anchor.diff:    });
   
     # The latest Hoogle needs versions not yet in LTS Haskell 7.x.
  -  hoogle = super.hoogle.override { haskell-src-exts = self.haskell-src-exts_1_19_0; };
  +  hoogle = super.hoogle.override { haskell-src-exts = self.haskell-src-exts_1_19_1; };
   
     # To be in sync with Hoogle.
     lambdabot-haskell-plugins = (overrideCabal super.lambdabot-haskell-plugins (drv: {
  
positive.code:   };
  
    # Needs new version.
    haskell-src-exts-simple = super.haskell-src-exts-simple.override { haskell-src-exts = self.haskell-src-exts_1_19_0; };
  
    # Test suite fails a QuickCheck property.
    optparse-applicative_0_13_0_0 = dontCheck super.optparse-applicative_0_13_0_0;
  
negative.code:       ln -s $lispdir $out/share/emacs/site-lisp
      '';
    })).override {
      haskell-src-exts = self.haskell-src-exts_1_19_1;
    };
  
    # # Make elisp files available at a location where people expect it.
  