Build Error

Whenever I try to build it is is outputing
`CMake Error at /usr/share/cmake-3.17/Modules/FindPackageHandleStandardArgs.cmake:164 (message):
Could NOT find Vala (missing: VALA_EXECUTABLE)
Call Stack (most recent call first):
/usr/share/cmake-3.17/Modules/FindPackageHandleStandardArgs.cmake:445 (_FPHSA_FAILURE_MESSAGE)
cmake/vala/FindVala.cmake:55 (find_package_handle_standard_args)
CMakeLists.txt:25 (find_package)

-- Configuring incomplete, errors occurred!`

I really want to use this because I want an applications menu for plank