Can you help me?

Project is quite simple:

` // file DataLoader.cxx
export module data_loader;

export class DataLoader {
public:
    virtual void instanceInfo() const = 0;
};


// file FileLoader.cxx
export module file_loader;
    
import data_loader;
import <iostream>;
import <string>;
    
export enum class FileType { csv };
    
export class FileLoader: public DataLoader {
public:
    FileLoader(FileType fileType, std::string filePath);
    FileLoader();
    ~FileLoader();
    void instanceInfo() const override;
private:
    static int count;
    FileType fileType;
    std::string filePath;
};
    
FileLoader::FileLoader(FileType fileType, std::string filePath):
    fileType(fileType), filePath(filePath) {
    ++count;
}
    
FileLoader::FileLoader() { ++count; }
    
FileLoader::~FileLoader() { --count; }
    
int FileLoader::count = 0;
    
export void FileLoader::instanceInfo() const {
    std::cout << "File #" << count;
    if (filePath.length())
        std::cout << " (" << filePath << ")";
    std::cout << std::endl;
}


// file main.cxx
import file_loader;
import <memory>;

using namespace std;

int main() {
    unique_ptr<FileLoader> fl(new FileLoader());
    fl->instanceInfo();

    unique_ptr<FileLoader> fl1(new FileLoader(FileType::csv, "test.csv"));
    fl1->instanceInfo();
}

// file CMakeLists.txt

cmake_minimum_required(VERSION 3.28)
project(cpp-data-viz LANGUAGES CXX)

set(CMAKE_CXX_STANDARD 20)

add_library(data_loader)
target_sources(data_loader PUBLIC
    FILE_SET CXX_MODULES
        FILES
            DataLoader.cxx)

add_library(file_loader)
target_sources(file_loader PUBLIC
    FILE_SET CXX_MODULES
        FILES
            FileLoader.cxx)

add_executable(main main.cxx)
target_link_libraries(main file_loader data_loader)`

But I get the error message below:

` cmake -GNinja ..

-- Configuring done (0.0s)
CMake Error in CMakeLists.txt:
  The target named "data_loader" has C++ sources that may use modules, but
  the compiler does not provide a way to discover the import graph
  dependencies.  See the cmake-cxxmodules(7) manual for details.  Use the
  CMAKE_CXX_SCAN_FOR_MODULES variable to enable or disable scanning.


CMake Error in CMakeLists.txt:
  The target named "file_loader" has C++ sources that may use modules, but
  the compiler does not provide a way to discover the import graph
  dependencies.  See the cmake-cxxmodules(7) manual for details.  Use the
  CMAKE_CXX_SCAN_FOR_MODULES variable to enable or disable scanning.


-- Generating done (0.0s)
CMake Generate step failed.  Build files cannot be regenerated correctly.`

VERSIONS:

` g++ version 11.4.0
cmake version 3.29.3
ninja version 1.12.1

`

I just want to be able to compile and run C++20 modules with CMake, but it’s kind of tricky.