From here: https://cmake.org/cmake/help/latest/manual/cmake-variables.7.html

CMake reserves identifiers that:
    begin with CMAKE_ (upper-, lower-, or mixed-case)

Following identifiers are declared by curl CMake script (there may be more):

CMAKE_USE_SCHANNEL
CMAKE_USE_SECTRANSP
CMAKE_USE_OPENSSL
CMAKE_USE_MBEDTLS
CMAKE_USE_BEARSSL
CMAKE_USE_NSS
CMAKE_USE_WOLFSSL

I suggest changing these identifiers to use CURL_ prefix instead:

CURL_USE_SCHANNEL
CURL_USE_SECTRANSP
CURL_USE_OPENSSL
CURL_USE_MBEDTLS
CURL_USE_BEARSSL
CURL_USE_NSS
CURL_USE_WOLFSSL

curl/libcurl version

7.80.0