Freetype library found but VTK/CMake/vtkDetectLibraryType.cmake fails

Building ParaView b61f9464 with paraview-superbuild@4d542fc5 and freetype is enabled.

libfreetype.so is found successfully in /usr/lib64, but configure fails with:

-- Found Freetype: /usr/lib64/libfreetype.so (found version "2.4.11") 
CMake Error at VTK/CMake/vtkDetectLibraryType.cmake:10 (message):
  The `PATH` argument is required.
Call Stack (most recent call first):
  VTK/CMake/FindFreetype.cmake:177 (vtk_detect_library_type)
  VTK/CMake/vtkModule.cmake:3518 (find_package)
  VTK/CMake/vtkModule.cmake:3968 (vtk_module_find_package)
  VTK/CMake/vtkModule.cmake:3866 (vtk_module_third_party_external)
  VTK/ThirdParty/freetype/CMakeLists.txt:1 (vtk_module_third_party)

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