Is beman.exemplar/beman.exemplar-version.cmake a vallid package name?

The problem is the package_version_file name was not valid!

This works better:

bash-5.2$ !tree
tree stagedir/lib/
stagedir/lib/
├── cmake
│   └── beman.exemplar
│       ├── beman.exemplar-config-version.cmake
│       ├── beman.exemplar-config.cmake
│       ├── beman.exemplar-targets-relwithdebinfo.cmake
│       └── beman.exemplar-targets.cmake
└── libbeman.exemplar.a

3 directories, 5 files
bash-5.2$ 

IMHO: The possible valid names are not so easy to find in the documentation as it should!

see CMakePackageConfigHelpers
and PackageVersionFile