anchor.diff:  /TREE [dir]    Root of the local tree of installed rocks.
                  Default is %PROGRAMFILES%\LuaRocks\systree
   /SCRIPTS [dir] Where to install commandline scripts installed by
  -               rocks. Default is {TREE}/bin.
  +               rocks. Default is {TREE}\bin.
  +/LUAMOD [dir]  Where to install Lua modules installed by rocks.
  +               Default is {TREE}\share\lua\{LV}.
  +/CMOD [dir]    Where to install c modules installed by rocks.
  +               Default is {TREE}\lib\lua\{LV}.
   /CONFIG [dir]  Location where the config file should be installed.
                  Default is to follow /P option
   /SELFCONTAINED Creates a self contained installation in a single
  
positive.code: 		elseif name == "/CONFIG" then
  			vars.SYSCONFDIR = option.value
  		elseif name == "/TREE" then
  			vars.ROCKS_TREE = option.value
  		elseif name == "/SCRIPTS" then
  			vars.SCRIPTS_DIR = option.value
  		elseif name == "/LV" then
  			vars.LUA_VERSION = option.value
  		elseif name == "/L" then
  
negative.code: 
  print()
  print("Creating rocktrees...")
  if not exists(vars.TREE_ROOT) then
  	mkdir(vars.TREE_ROOT)
  	print(S[[Created system rocktree    : "$TREE_ROOT"]])
  else
  	print(S[[System rocktree exists     : "$TREE_ROOT"]])
  end
  
  vars.APPDATA = os.getenv("APPDATA")
  