anchor.diff:  vars.CONFIG_FILE = vars.SYSCONFDIR.."\\"..vars.SYSCONFFILENAME
   if SELFCONTAINED then
   	vars.SYSCONFDIR = vars.PREFIX
  -	vars.SYSCONFFORCE = true
   	vars.TREE_ROOT = vars.PREFIX..[[\systree]]
   	REGISTRY = false
   end
  
positive.code: vars.PREFIX = nil
  vars.VERSION = "3.0"
  vars.SYSCONFDIR = nil
  vars.SYSCONFFORCE = nil
  vars.CONFBACKUPDIR = nil
  vars.SYSCONFFILENAME = nil
  vars.CONFIG_FILE = nil
  
negative.code:    SYSTEM = [[$SYSTEM]],
     PROCESSOR = [[$UNAME_M]],
     PREFIX = [[$PREFIX]],
     SYSCONFDIR = [[$SYSCONFDIR]],
     WIN_TOOLS = [[$PREFIX/tools]],
  ]=])
  if FORCE_CONFIG then
  	f:write("   FORCE_CONFIG = true,\n")
  end
  f:write("}\n")
  f:close()
  