Error while building SlicerSALT

Hi,
I try to build SlicerSALT by myself but after the

make -j 6

I receive this error:

CMake Error at CMake/ctkMacroGenerateMocs.cmake:30 (QT5_CREATE_MOC_COMMAND):
  QT5_CREATE_MOC_COMMAND Function invoked with incorrect arguments for
  function named: QT5_CREATE_MOC_COMMAND
Call Stack (most recent call first):
  CMake/ctkMacroBuildLib.cmake:121 (QT4_GENERATE_MOCS)
  Libs/Widgets/CMakeLists.txt:448 (ctkMacroBuildLib)


CMake Error at CMake/ctkMacroGenerateMocs.cmake:30 (QT5_CREATE_MOC_COMMAND):
  QT5_CREATE_MOC_COMMAND Function invoked with incorrect arguments for
  function named: QT5_CREATE_MOC_COMMAND
Call Stack (most recent call first):
  CMake/ctkMacroBuildLib.cmake:121 (QT4_GENERATE_MOCS)
  Libs/Widgets/CMakeLists.txt:448 (ctkMacroBuildLib)

Does anyone know how to fix this error?

Thank you for your help
Louis.

Hi Louis,

On what OS are you building SALT?