CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY

By default this variable is not set. If neither CMAKE_FIND_USE_PACKAGE_REGISTRY nor CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY is set, then find_package() will use the User Package Registry unless the NO_CMAKE_PACKAGE_REGISTRY option is provided.

CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY is ignored if CMAKE_FIND_USE_PACKAGE_REGISTRY is set.

In some cases, for example to locate only system wide installations, it is not desirable to use the User Package Registry when searching for packages. If the CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY variable is TRUE, all the find_package() commands will skip the User Package Registry as if they were called with the NO_CMAKE_PACKAGE_REGISTRY argument.

See also Disabling the Package Registry.