;; required	hackerlab-core		hackerlab --version 0.0
;; 	What is the installation root of the 
;; 	hackerlab core?
;; 
;; 
;; required	x11			x11
;; 	Where is X11 installed?
;; 
;; 	
;; optional	tcltk			tcltk --version 8.0
;; 	Where is Tcl/Tk?
;; 
;;