anchor.diff:  vars.INCDIR = S"$FULL_PREFIX\\include"
   vars.LUA_SHORTV = vars.LUA_VERSION:gsub("%.", "")
   
  -if not look_for_lua_install() then
  -	print("Could not find Lua. Will install its own copy.")
  -	print("See /? for options for specifying the location of Lua.")
  +if INSTALL_LUA then
   	if vars.LUA_VERSION ~= "5.1" then
   		die("Cannot install own copy because no 5.2 version is bundled")
   	end
  -	INSTALL_LUA = true
   	vars.LUA_INTERPRETER = "lua5.1"
   	vars.LUA_BINDIR = vars.BINDIR
   	vars.LUA_LIBDIR = vars.LIBDIR
  
positive.code: System architecture detected as: $UNAME_M
  
  ]])
  end
  
  -- ***********************************************************
  -- Install LuaRocks files
  
negative.code: -- ***********************************************************
  local function look_for_interpreter (directory)
  	if vars.LUA_BINDIR then
          -- if LUA_BINDIR is specified, it must be there, otherwise we fail
  		if exists( S"$LUA_BINDIR\\lua$LUA_VERSION.exe" ) then
  			vars.LUA_INTERPRETER = S"lua$LUA_VERSION.exe"
  			print(S"       Found $LUA_BINDIR\\$LUA_INTERPRETER")
  