Tag to be used with the main branch of atlas/athena. Update(s) since 2.1.50: - Added extra checks / warnings to lcg_need_rpm(...); - Disabled the build of the libffi documentation; - Added timestamps to all the build commands saved into the package specific log files; - Updated LHAPDF to version 6.5.5; - Made the installed Cython executables relocatable; - Made TritonClient build successfully with Ninja; - Updated nanobind to version 2.7.0.