(frame :width 100. 
       (prog :line 10 :mark "##" [
SKRIBE=skribe

all: demo.html demo.man  ##main-goal

demo.html: demo.skb
	$(SKRIBE) demo.skb -o demo.html

demo.man: demo.skb
	$(SKRIBE) demo.skb -o demo.man
]))

(p [The main goal is specified line ,(ref :line "main-goal").])