<<< packages_pkgcheck_scan >>>
    UnusedLocalUse: unused local USE flags: [ freetype, json, kits, las, offscreen, openvdb, pdal, pegtl, sdl, vtkm ]
<<< open bugs >>>
  https://bugs.gentoo.org/945731 sci-libs/vtk-9.3.0-r3_GUISupport/Qt/QVTKOpenGLWindow.cxx:255:43:_error:_'GL_BACK_LEFT'_was_not_declared_in_this_scope
  https://bugs.gentoo.org/956619 sci-libs/vtk-9.4.2_upgrade_from_stable_sci-libs/vtk-9.3.1_compile_tests_failure
  https://bugs.gentoo.org/965312 sci-libs/vtk-9.4.2-r2_-_failed_to_rebuild_after_system_update_-_error:_'/usr/lib64/libtbb.so.12.15',_needed_by_'lib64/libvtkIOOCCT-9.4.so.9.4',_missing
  https://bugs.gentoo.org/253881 sci-visualisation/paraview_bundles_an_internal_copy_of_sci-libs/vtk
  https://bugs.gentoo.org/873601 sci-libs/vtk-9.1.0-r2_fails_to_compile_(MUSL):_loguru.cpp:98:18:_fatal_error:_execinfo.h:_No_such_file_or_directory
  https://bugs.gentoo.org/882405 sci-libs/vtk-9.1.0-r4_fails_to_compile_on_ppc
  https://bugs.gentoo.org/928127 sci-libs/vtk:_fails_tests_with:_Loguru_caught_a_signal:_SIGFPE
  https://bugs.gentoo.org/945964 sci-libs/vtk-9.3.1[cgns]_fails_to_compile_with_sci-libs/hdf5[-cxx]_CMake_error:_&quot;missing:_HDF5_INCLUDE_DIRS&quot;
  https://bugs.gentoo.org/968821 sci-libs/vtk-9.5.2:_stablereq
  https://bugs.gentoo.org/969110 sci-libs/vtk-9.5.2_IUSE_ffmpeg,_mpi,_views_and_truetype_appear_to_require_USE=rendering
  https://bugs.gentoo.org/886317 sci-libs/vtk-9.2.2-r1_overwrites_user's_optimization_(-O*)
  https://bugs.gentoo.org/889340 sci-visualization/paraview:_file_collision_with_sci-libs/vtk