anchor.diff:      ];
     };
   }
  -
  
positive.code:     sha256 = "1jaz0l22xj7x1k4rb9ia6i1psnbwk4pblgq4gfvya7gg7fbb7r36";
      })
    ;
    buildInputs = [ tcl tk ];
    # the configure script expects to find the location of the sources of
    # tcl and tk in {tcl,tk}Config.sh
    # In fact, it only needs some private headers. We copy them in
  
negative.code:     done;
      '';
    configureFlags = [
      "--with-tclconfig=."
      "--with-tkinclude=${tk.dev}/include"
      "--with-tkconfig=."
  