I have been trying to build with Qt creator but not having much luck. I get down to step 8 but can't generate the cmakecache.txt properly. As far as I can see I have followed the earlier steps verbatum and I have read the instructions for a cmakelists project which just says the same as what you have listed. Any other clues?
Perhaps he was checking out from with Creator. Simply start Creator, go to Open Project (or file - what ever it's called) and open the main CMakeLists.txt file.