Can't load '/Users/xxx/Library/ActivePerl-5.22/lib/auto/Tk/Tk.bundle' for module Tk: dlopen(/Users/xxx/Library/ActivePerl-5.22/lib/auto/Tk/Tk.bundle, 1): Library not loaded: /opt/X11/lib/libX11.6.dylib
  Referenced from: /Users/xxx/Library/ActivePerl-5.22/lib/auto/Tk/Tk.bundle
  Reason: image not found at /usr/local/ActivePerl-5.22/lib/DynaLoader.pm line 198.
 at halloworld.pl line 4.
Compilation failed in require at halloworld.pl line 4.