Fixup Makefiles.

tools/schemify-tree.scm

@@ -14,7 +14,7 @@
 	    (cdr args)))))
 
 (define args (get-argv))
-(when (not (eq? (length args) 1))
+(when (< (length args) 1)
   (display "usage: schemify-tree dir")
   (newline)
   (exit 1))