tomlplusplus: Installation and use with Meson doesn't seem to work

Environment

toml++ version and/or commit hash:

3.3.0 from meson subproject

Compiler:

Apple Clang 13

C++ standard mode:

not sure, the default one

Target arch:

x86_64

Library configuration overrides:

Relevant compilation flags:

Describe the bug

../main.cxx:2:10: fatal error: 'toml++/toml.hpp' file not found
#include <toml++/toml.hpp>

where main.cxx is this example

Steps to reproduce (or a small repro code sample)

Follow the instructions and use the following build configuration

meson.build

project('test_tomlplusplus', 'cpp')

tomlplusplus = dependency('tomlplusplus')

executable('main', 'main.cxx', dependencies : tomlplusplus)

then compile with meson compile -C build

Additional information

This is my meson setup output

The Meson build system
Version: 1.3.1
Source dir: /Users/michele/Documents/Programming/test_tomlplusplus
Build dir: /Users/michele/Documents/Programming/test_tomlplusplus/build_meson
Build type: native build
Project name: test_tomlplusplus
Project version: undefined
C++ compiler for the host machine: c++ (clang 13.0.0 "Apple clang version 13.0.0 (clang-1300.0.29.30)")
C++ linker for the host machine: c++ ld64 711
Host machine cpu family: x86_64
Host machine cpu: x86_64
Found pkg-config: YES (/usr/local/bin/pkg-config) 0.29.2
Found CMake: /usr/local/bin/cmake (3.28.1)
Run-time dependency tomlplusplus found: NO (tried pkgconfig, framework and cmake)
Looking for a fallback subproject for the dependency tomlplusplus

Executing subproject tomlplusplus

tomlplusplus| Project name: tomlplusplus
tomlplusplus| Project version: 3.3.0
tomlplusplus| C++ compiler for the host machine: c++ (clang 13.0.0 "Apple clang version 13.0.0 (clang-1300.0.29.30)")
tomlplusplus| C++ linker for the host machine: c++ ld64 711
tomlplusplus| Message: target cpu_family: x86_64
tomlplusplus| Message: target cpu: x86_64
tomlplusplus| Message: target system: darwin
tomlplusplus| Message: target endian: little
tomlplusplus| Compiler for C++ supports arguments -ferror-limit=5: YES
tomlplusplus| Compiler for C++ supports arguments -fmax-errors=5: NO
tomlplusplus| Compiler for C++ supports arguments -Wno-unused-command-line-argument: YES
tomlplusplus| Compiler for C++ supports arguments -Wno-reserved-macro-identifier: NO
tomlplusplus| Compiler for C++ supports arguments -Wno-init-list-lifetime: NO
tomlplusplus| Compiler for C++ supports arguments -fchar8_t: YES
tomlplusplus| Compiler for C++ supports arguments /bigobj: NO
tomlplusplus| Compiler for C++ supports arguments /Gy: NO
tomlplusplus| Compiler for C++ supports arguments /GF: NO
tomlplusplus| Compiler for C++ supports arguments /openmp-: NO
tomlplusplus| Compiler for C++ supports arguments /permissive-: NO
tomlplusplus| Compiler for C++ supports arguments /utf-8: NO
tomlplusplus| Compiler for C++ supports arguments /volatile:iso: NO
tomlplusplus| Compiler for C++ supports arguments /Zc:__cplusplus: NO
tomlplusplus| Compiler for C++ supports arguments /Zc:inline: NO
tomlplusplus| Compiler for C++ supports arguments /Zc:externConstexpr: NO
tomlplusplus| Compiler for C++ supports arguments /Zc:preprocessor: NO
tomlplusplus| Compiler for C++ supports arguments /Zc:throwingNew: NO
tomlplusplus| Compiler for C++ supports arguments -D_HAS_EXCEPTIONS=1: YES
tomlplusplus| Compiler for C++ supports arguments -Wno-c++98-compat: YES
tomlplusplus| Compiler for C++ supports arguments -Wno-c++98-compat-pedantic: YES
tomlplusplus| Compiler for C++ supports arguments -Wno-documentation: YES
tomlplusplus| Compiler for C++ supports arguments -Wno-documentation-unknown-command: YES
tomlplusplus| Compiler for C++ supports arguments -Wno-switch-enum: YES
tomlplusplus| Compiler for C++ supports arguments -Wno-covered-switch-default: YES
tomlplusplus| Compiler for C++ supports arguments -Wno-padded: YES
tomlplusplus| Compiler for C++ supports arguments -Wno-float-equal: YES
tomlplusplus| Compiler for C++ supports arguments -DTOML_HEADER_ONLY=0: YES
tomlplusplus| Compiler for C++ supports arguments -DTOML_SHARED_LIB=1: YES
tomlplusplus| Build targets in project: 1
tomlplusplus| Subproject tomlplusplus finished.

Dependency tomlplusplus found: YES 3.3.0 (overridden)
Build targets in project: 2

test_tomlplusplus undefined

  Subprojects
    tomlplusplus: YES

Found ninja-1.11.1 at /usr/local/bin/ninja

while the following is the (working) CMake configuration

cmake_minimum_required(VERSION 3.27)

project(test_tomlplusplus)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED True)

include(FetchContent)
FetchContent_Declare(
    tomlplusplus
    GIT_REPOSITORY https://github.com/marzer/tomlplusplus.git
    GIT_TAG v3.4.0
)
FetchContent_MakeAvailable(tomlplusplus)

add_executable(main main.cxx)

# target_link_libraries(main PUBLIC tomlplusplus)
target_include_directories(main PUBLIC
    ${tomlplusplus_SOURCE_DIR}/include
)