anchor.diff:  
       grpc                       =       pkgs.grpc;
   
  -    overlay                    = overlay;
  +    inherit pkgs config overlay;
       inherit (pkgs) test-grpc-haskell;
     }
  
positive.code:                 })
              );
  
          parameterized = pkgsNew.haskell.lib.appendPatch haskellPackagesOld.parameterized ./nix/parameterized.patch;
  
        };
      };
  
negative.code:                     pkgs.grpcio-tools
                    ]);
  
                  in {
                    configureFlags = (oldDerivation.configureFlags or []) ++ [
                      "--flags=with-examples"
                    ];
  
                    buildDepends = (oldDerivation.buildDepends or [ ]) ++ [
                      pkgsNew.makeWrapper
                      # Give our nix-shell its own cabal so we don't pick up one
                      # from the user's environment by accident.
  