anchor.diff: -{ lib, fetchurl, tcl }:
  +{ lib, fetchurl, tcl, tk }:
   
   let
     version = "1.9.14";
  
positive.code:   };
  
    dontBuild = true;
  
    installPhase = ''
      mkdir -p "$out/lib/${libPrefix}"
  
negative.code:   meta = {
      homepage = "https://sourceforge.net/projects/tcllib";
      description = "High-level widget set for Tcl/Tk";
      maintainers = with lib.maintainers; [ agbrooks ];
      license = lib.licenses.tcltk;
      platforms = lib.platforms.linux;
    };
  