help request: libksysguard build failure on Stream 8

I'm updating/ rebuilding KDE Plasma Desktop on CentOS Stream 8, for the updated qt5 that is there. I am using what is in F34 for the update. I've got all the qt5 5.15.2 and kf5 5.83.0 packages built and in the buildroot. For libksysguard I believe I have all other dependencies built and in the buildroot. But it just keeps failing, despite everything I've tried.[1][2] I get the same error on all arches. The same error on version 5.22.1, 5.22.2 and even 5.21.4. I've tried passing build parameters that I thought went along with the error, but nothing changed. I think this is the critical error, but it's possible I'm wrong CMakeFiles/processcore.dir/cgroup_data_model.cpp.o: In function `KSysGuard::CGroupDataModel::update(KSysGuard::CGroup*) [clone .localalias.209]': /usr/include/c++/8/bits/fs_path.h:185: undefined reference to `std::filesystem::__cxx11::path::_M_split_cmpts()' CMakeFiles/processcore.dir/cgroup_data_model.cpp.o: In function `KSysGuard::CGroupDataModel::update(KSysGuard::CGroup*) [clone .localalias.209]': /usr/include/c++/8/bits/fs_dir.h:371: undefined reference to `std::filesystem::__cxx11::directory_iterator::directory_iterator(std::filesystem::__cxx11::path const&, std::filesystem::directory_options, std::error_code*)' CMakeFiles/processcore.dir/cgroup_data_model.cpp.o: In function `KSysGuard::CGroupDataModel::update(KSysGuard::CGroup*)': /builddir/build/BUILD/libksysguard-5.22.2.1/processcore/cgroup_data_model.cpp:447: undefined reference to `std::filesystem::__cxx11::directory_iterator::operator*() const' /builddir/build/BUILD/libksysguard-5.22.2.1/processcore/cgroup_data_model.cpp:447: undefined reference to `std::filesystem::__cxx11::directory_iterator::operator++()' CMakeFiles/processcore.dir/cgroup_data_model.cpp.o: In function `KSysGuard::CGroupDataModel::update(KSysGuard::CGroup*) [clone .localalias.209]': /usr/include/c++/8/bits/fs_dir.h:260: undefined reference to `std::filesystem::status(std::filesystem::__cxx11::path const&)' collect2: error: ld returned 1 exit status Any help would be appreciated. Troy [1] - https://koji.fedoraproject.org/koji/taskinfo?taskID=70653878 [2] - https://kojipkgs.fedoraproject.org//work/tasks/3890/70653890/build.log