GNUInstallDirs module raise warning when used in pure CMake project

I have a pure CMake project that uses GNUInstallDirs module to install files to CMAKE_INSTALL_DATADIR . In both CMake 3.22.1 and 3.23.1, this raise a warning:

CMake Warning (dev) at /home/straversaro/mambaforge/envs/cmake/share/cmake-3.23/Modules/GNUInstallDirs.cmake:241 (message):
  Unable to determine default CMAKE_INSTALL_LIBDIR directory because no
  target architecture is known.  Please enable at least one language before
  including GNUInstallDirs.
Call Stack (most recent call first):
  CMakeLists.txt:3 (include)
This warning is for project developers.  Use -Wno-dev to suppress it.

-- Configuring done
-- Generating done
-- Build files have been written to: /home/straversaro/testgid/buildconda

It is possible to easily reproduce the problem with this CMakeLists.txt :

cmake_minimum_required(VERSION 3.16)
project(PureCMakeProject VERSION 1.0 LANGUAGES NONE)
include(GNUInstallDirs)

Not sure if this is a problem of documentation or of GNUInstallDirs module, but I am not sure how I am supposed to fix the warning:

• the project that I am building does not have any C or C++ code, so it does not make sense to add C or CXX to languages
• on the other hand, it is totaly fine for a LANGUAGES NONE project to use some GNUInstallDirs