VMTK extension : build fails with VTK9

Slicer builds nicely with VTK9 on Arch Linux with gcc 10.2.

VMTK extension fails to build with these errors :

[ 18%] Performing configure step for ‘VMTK’
loading initial cache file /home/arc/src/SlicerExtension-VMTK-SuperBuild/SlicerVmtk-build/VMTK-prefix/tmp/VMTK-cache-Release.cmake
CMake Error at CMake/CMakeOptions.cmake:75 (include):
include could not find load file:


Call Stack (most recent call first):
vtkVmtk/CMakeLists.txt:25 (include)

CMake Error at /home/arc/src/Slicer-SuperBuild/VTK-build/lib/cmake/vtk-9.0/vtk-config.cmake:78 (message):
The new name for the ‘vtkIOImage’ component is ‘IOImage’. By requesting at
least version 8.90, the new component names are now required.
Call Stack (most recent call first):
/home/arc/src/Slicer-SuperBuild/VTK-build/vtk-config.cmake:1 (include)
vtkVmtk/Utilities/vtkvmtkITK/CMakeLists.txt:12 (find_package)

Can’t workaround this one.

Thank you for looking into it.