I built VMTK at 6c189dd6 with the following errors:
CMake Error at /home/arc/src/SlicerExtension-VMTK-SuperBuild9/VMTK-build/CMake/vtkWrapPython.cmake:209 (find_package):
By not providing "FindPythonLibs.cmake" in CMAKE_MODULE_PATH this project
has asked CMake to find a package configuration file provided by
"PythonLibs", but CMake did not find one.
If the changes in CMakeLists introduced by that commit are reverted, VMTK builds fine. Then SlicerVMTK can be built in turn.
This commit (6c189dd6) probably needs the python changes it is expecting and they do not seem to be compatible with Slicer python.
It looks like there might be a need for a SlicerPreview specific branch in the VMTK repository. It won’t be an easy task to maintain SlicerVMTK otherwise.
Or may be there’s some simpler solution.