anchor.diff:      ];
     };
   }
  -
  
positive.code:     done;
      '';
    configureFlags = [
      "--with-tclinclude=${tcl}/include"
      "--with-tclconfig=."
      "--with-tkinclude=${tk.dev}/include"
      "--with-tkconfig=."
  
negative.code: { lib, stdenv, fetchurl, tcl, tk, fetchpatch } :
  
  tcl.mkTclDerivation {
    version = "8.4.3";
    pname = "tix";
    src = fetchurl {
  