Could not extract Qt version from .

[UnknownObject000]

I cloned this repo, put in to a empty folder and run those command in readme.md. Then I got this:

CMake Warning at CMakeLists.txt:56 (message):
  Could not extract Qt version from .  Please check if the file exists and
  contains the PACKAGE_VERSION.


CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage
CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage
Configuring incomplete, errors occurred!

Did I put it in wrong place? Or I need to run it with some special cmake?