The installed fmt lib header are not the headers used while build!

[ClausKlein]

Claus-MBP:.build-cxx.simplelog-Debug clausklein$ ninja -t deps | egrep -w '(fmt)' | sort -u
    /Users/clausklein/Workspace/cpp/cxx.simplelog/lib/fmt/include/fmt/core.h
    /Users/clausklein/Workspace/cpp/cxx.simplelog/lib/fmt/include/fmt/format-inl.h
    /Users/clausklein/Workspace/cpp/cxx.simplelog/lib/fmt/include/fmt/format.h
    /Users/clausklein/Workspace/cpp/cxx.simplelog/lib/fmt/include/fmt/posix.h
    /Users/clausklein/Workspace/cpp/cxx.simplelog/lib/fmt/src/format.cc
    /Users/clausklein/Workspace/cpp/cxx.simplelog/lib/fmt/src/posix.cc
    /Users/clausklein/Workspace/cpp/cxx.simplelog/lib/spdlog/include/spdlog/fmt/bundled/core.h
    /Users/clausklein/Workspace/cpp/cxx.simplelog/lib/spdlog/include/spdlog/fmt/bundled/format-inl.h
    /Users/clausklein/Workspace/cpp/cxx.simplelog/lib/spdlog/include/spdlog/fmt/bundled/format.h
    /Users/clausklein/Workspace/cpp/cxx.simplelog/lib/spdlog/include/spdlog/fmt/fmt.h
    /Users/clausklein/Workspace/cpp/cxx.simplelog/lib/spdlog/src/fmt.cpp
fmt/CMakeFiles/fmt.dir/src/format.cc.o: #deps 237, deps mtime 1580499571000000000 (VALID)
fmt/CMakeFiles/fmt.dir/src/posix.cc.o: #deps 266, deps mtime 1580499574000000000 (VALID)
spdlog/CMakeFiles/spdlog.dir/src/fmt.cpp.o: #deps 237, deps mtime 1580499570000000000 (VALID)

Claus-MBP:.build-cxx.simplelog-Debug clausklein$ cmake -B . -L | grep FMT
CMake Error: The source directory "/Users/clausklein/Workspace/cpp/.build-cxx.simplelog-Debug" does not appear to contain CMakeLists.txt.
Specify --help for usage, or press the help button on the CMake GUI.
FMT_CUDA_TEST:BOOL=OFF
FMT_DOC:BOOL=OFF
FMT_FUZZ:BOOL=OFF
FMT_INSTALL:BOOL=OFF
FMT_PEDANTIC:BOOL=OFF
FMT_TEST:BOOL=OFF
FMT_WERROR:BOOL=OFF
SIMPLELOG_USE_BUNDLED_FMTLIB:BOOL=ON
SPDLOG_FMT_EXTERNAL:BOOL=OFF
SPDLOG_FMT_EXTERNAL_HO:BOOL=OFF

Claus-MBP:.build-cxx.simplelog-Debug clausklein$ grep -w fmt install_manifest.txt 
/usr/local/include/spdlog/fmt/bin_to_hex.h
/usr/local/include/spdlog/fmt/fmt.h
/usr/local/include/spdlog/fmt/ostr.h
/usr/local/include/spdlog/fmt/bundled//chrono.h
/usr/local/include/spdlog/fmt/bundled//color.h
/usr/local/include/spdlog/fmt/bundled//compile.h
/usr/local/include/spdlog/fmt/bundled//core.h
/usr/local/include/spdlog/fmt/bundled//format-inl.h
/usr/local/include/spdlog/fmt/bundled//format.h
/usr/local/include/spdlog/fmt/bundled//LICENSE.rst
/usr/local/include/spdlog/fmt/bundled//locale.h
/usr/local/include/spdlog/fmt/bundled//ostream.h
/usr/local/include/spdlog/fmt/bundled//posix.h
/usr/local/include/spdlog/fmt/bundled//printf.h
/usr/local/include/spdlog/fmt/bundled//ranges.h
Claus-MBP:.build-cxx.simplelog-Debug clausklein$