build broken with boost 1.89.0 : cmake can't find boost_system

openmw trunk 2e67c8b4 Boost 1.89.0

CMake Error at /usr/lib/cmake/Boost-1.89.0/BoostConfig.cmake:141 (find_package):
  Could not find a package configuration file provided by "boost_system"
  (requested version 1.89.0) with any of the following names:

    boost_systemConfig.cmake
    boost_system-config.cmake

  Add the installation prefix of "boost_system" to CMAKE_PREFIX_PATH or set
  "boost_system_DIR" to a directory containing one of the above files.  If
  "boost_system" provides a separate development package or SDK, be sure it
  has been installed.
Call Stack (most recent call first):
  /usr/lib/cmake/Boost-1.89.0/BoostConfig.cmake:262 (boost_find_component)
  CMakeLists.txt:457 (find_package)

-- Configuring incomplete, errors occurred!

No issues with building against boost 1.88.0