Installation error in Arch Linux

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I am trying to install gazebo in arhlinux. I used the following command

yaourt gazebo

It installed all the dependencies and started the installation for gazebo. Then the following error occured

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CMake Error at /usr/share/cmake-3.4/Modules/FindPackageHandleStandardArgs.cmake:148 (message):
  Could NOT find Qt4 (missing: QT_QTWEBKIT_INCLUDE_DIR QT_QTWEBKIT_LIBRARY)
  (found version "4.8.7")
Call Stack (most recent call first):
  /usr/share/cmake-3.4/Modules/FindPackageHandleStandardArgs.cmake:388 (_FPHSA_FAILURE_MESSAGE)
  /usr/share/cmake-3.4/Modules/FindQt4.cmake:1333 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  cmake/SearchForStuff.cmake:547 (find_package)
  CMakeLists.txt:128 (include)


-- Configuring incomplete, errors occurred!

It says that it can't find Qt4, even though I have it in my system. I did some googling and came across some thread which said that gazebo supports only Qt4 4.6. It would be extremely helpful if you can guide me on what to do now.