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:    SYSTEM = [[$SYSTEM]],
     PROCESSOR = [[$UNAME_M]],
     PREFIX = [[$PREFIX]],
     WIN_TOOLS = [[$PREFIX/tools]],
  ]=])
  if FORCE_CONFIG then
  	f:write("   FORCE_CONFIG = true,\n")
  end
  if vars.SYSCONFFORCE then  -- only write this value when explcitly given, otherwise rely on defaults
  	f:write(S("   SYSCONFDIR = [[$SYSCONFDIR]],\n"))
  end
  f:write("}\n")
  f:close()
  
negative.code: 			vars.PREFIX = option.value
  		elseif name == "/CONFIG" then
  			vars.SYSCONFDIR = option.value
  		elseif name == "/TREE" then
  			vars.TREE_ROOT = option.value
  		elseif name == "/SCRIPTS" then
  