building with gtest gtest_force_shared_crt doesn't work

I have a project set to link with gtest like so:

FetchContent_Declare(googletest
                     GIT_REPOSITORY https://github.com/google/googletest
                     GIT_TAG master
        )
FetchContent_MakeAvailable(googletest)

set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)

target_link_libraries(testlib PRIVATE projlib gtest_main)

as you can see I link to gtest and also make sure to set:

set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)

yet when I build my projblib with cmake I get that the run time library version still mismatch:

gtestd.lib(gtest-all.obj) : error LNK2038: mismatch detected for 'RuntimeLibrary': value 'MTd_StaticDebug' doesn't matc
h value 'MDd_DynamicDebug'

Not sure why this happens and how to fix this, suggestions?