antlr4 c++ runtime not compiling using conan package manager

Question

I'm trying to create a simple application that uses antlr4 c++ runtime to parse Java source files. However, I could not compile it due to problems with conan package manager.

I'm following antlr recommendation to use conan package manager.

My CMakeLists.txt file content is:

cmake_minimum_required(VERSION 3.15)
project(JavaParserCppRuntime)

find_package(antlr4-runtime REQUIRED)

add_executable(${PROJECT_NAME} src/main.cpp)

target_link_libraries(${PROJECT_NAME} antlr4-runtime)

My conanfile.txt content is:

[requires]
antlr4-cppruntime/4.13.0

[generators]
CMakeDeps
CMakeToolchain

The root of my project is the folder conan-pkg-based, and the directory structure is on the following image. Project directory structure

I executed the following commands in terminal with success (as recommended in conan documentation):

conan profile detect
conan install . --output-folder=build --build=missing
cmake .. -DCMAKE_TOOLCHAIN_FILE=conan_toolchain.cmake -DCMAKE_BUILD_TYPE=Release

However, when I try to execute the last command cmake --build ., I get the following error:

<...>/conan-pkg-based/src/main.cpp:17:10: fatal error: antlr4-runtime.h: No such file or directory
   17 | #include "antlr4-runtime.h"
      |          ^~~~~~~~~~~~~~~~~~
compilation terminated.
gmake[2]: *** [CMakeFiles/JavaParserCppRuntime.dir/build.make:76: CMakeFiles/JavaParserCppRuntime.dir/src/main.cpp.o] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:83: CMakeFiles/JavaParserCppRuntime.dir/all] Error 2
gmake: *** [Makefile:91: all] Error 2

The main.cpp file content is:

/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
 * Use of this file is governed by the BSD 3-clause license that
 * can be found in the LICENSE.txt file in the project root.
 */

//
//  main.cpp
//  antlr4-cpp-demo
//
//  Created by Mike Lischke on 13.03.16.
//

#include <iostream>
#include <fstream>
#include <string>

#include "antlr4-runtime.h"
#include "JavaLexer.h"
#include "JavaParser.h"

// using namespace antlrcpptest;
using namespace antlr4;

void parse_file(char* file_path)
{
  std::ifstream file(file_path); // Open the file for reading

  if (file.is_open()) { // Check if the file was successfully opened
      std::string line;
      while (std::getline(file, line)) { // Read the file line by line
          std::cout << line << std::endl; // Print each line
      }

      ANTLRInputStream input(line);
      JavaLexer lexer(&input);
      CommonTokenStream tokens(&lexer);

      tokens.fill();
      for (auto token : tokens.getTokens()) {
        std::cout << token->toString() << std::endl;
      }

      JavaParser parser(&tokens);
      tree::ParseTree* tree = parser.compilationUnit();

      std::cout << tree->toStringTree() << std::endl << std::endl;

      file.close(); // Close the file when done reading
  } else {
      std::cout << "Failed to open the file." << std::endl;
  }
}

int main(int argc, char* argv[]) 
{
  parse_file(argv[0]);
  parse_file(argv[1]);
  return 0;
}

The error clearly says that when the cmake tries to compile the main.cpp it cannot find the "antlr4-runtime.h" header. But that header should be provided by conan.