Using exix2 in my CMakeLists.txt files

[perdrix52]

If I add:

find_package(exiv2 REQUIRED)
find_package(expat REQUIRED)

to my top level CMakeLists.txt, and in the lower level CMakeLists.txt I have (e.g.):

target_link_libraries(DeepSkyStacker PRIVATE
#    TIFF::tiff
    Exiv2::exiv2lib
    expat::expat
    JPEG::JPEG
    OpenMP::OpenMP_CXX
    ZLIB::ZLIB
)

I get a nastygram from CMake saying:
1```

[CMake] CMake Error at /usr/local/lib/cmake/exiv2/exiv2Export.cmake:61 (set_target_properties):
1> [CMake] The link interface of target "Exiv2::exiv2lib" contains:
1> [CMake]
1> [CMake] inih::libinih
1> [CMake]
1> [CMake] but the target was not found. Possible reasons include:
1> [CMake]
1> [CMake] * There is a typo in the target name.
1> [CMake] * A find_package call is missing for an IMPORTED target.
1> [CMake] * An ALIAS target is missing.
1> [CMake]
1> [CMake] Call Stack (most recent call first):
1> [CMake] /usr/local/lib/cmake/exiv2/exiv2Config.cmake:38 (include)
1> [CMake] CMakeLists.txt:73 (find_package)
1> [CMake] -- Generating done (0.0s)
1> [CMake] CMake Generate step failed. Build files cannot be regenerated correctly.

I'm guessing that this may be related to FindBrotli.cmake, FindFilesystem.cmake and Findinih.cmake that are in the cmake directory of the archive, but are not copied to /usr/local/lib/cmake when the install is run.  I could be totally wrong though.

What should I do to resolve the problem please