Can't configure a CMake project which requires dependent packages

Have a simple CMakeLists.txt as attached:

cmake_minimum_required(VERSION 3.0)
cmake_policy(VERSION 3.0)
project(bla)
find_package(bla 1.0.0 REQUIRED)

Try to open it with Qt Creator, in General messages you will see a failure that package bla isn't found, bla_DIR should be set.

Go to Project build settings, and see "Configuration failed" mesage.
The variable table does not appear, and thus bla_DIR can't be set, thus can't configure the project.