file(MAKE_DIRECTORY "${DESTINATION}")
file(GLOB definitions "${SOURCE}/*.toml")
foreach(definition IN LISTS definitions)
    get_filename_component(name "${definition}" NAME)
    configure_file("${definition}" "${DESTINATION}/${name}" COPYONLY)
endforeach()
# Remove only stale definitions in the build's asset directory.
file(GLOB old_definitions "${DESTINATION}/*.toml")
foreach(definition IN LISTS old_definitions)
    get_filename_component(name "${definition}" NAME)
    if(NOT EXISTS "${SOURCE}/${name}")
        file(REMOVE "${definition}")
    endif()
endforeach()