can skip right to the discussion of =CVS= changes.
 However, if you're adding a whole new external package, there are a
 few more steps (both for =autoconf= and =imake=, so read
-on...
+on... In either case, before using your new external you should run
+=./build_init= to repopulate the cf files with correct info.
 
 To add a whole new kind of external, you've got to understand a
 bit about that =[soft]= argument (the requirement level), modify