Should eigen-dev put its cmake rules into /usr/lib/cmake instead of /usr/share/cmake?

On Alpine Linux 3.11.3, package eigen-dev stores its *.cmake files in /usr/share/cmake/Modules; see package contents. Is this the correct path?

By default, cmake on Alpine 3.11.3 does not seem to read config files from /usr/share/cmake; therefore, when a developer calls find_package(Eigen3 CONFIG REQUIRED) in their own CMakeLists.txt, the build will fail on an Alpine system with eigen-dev installed. As a work-around, developers can set the environment variable Eigen3_DIR=/usr/share/cmake/Modules before calling cmake. However, this is rather painful to find out; it would be nicer if things were working out of the box. Other Alpine packages, such as llvm-dev or clang-dev, seem to be placing their developer-facing cmake configs into /usr/lib/cmake. Should the eigen-dev package do that, too?