История изменений

CMake Error at src/cpp/desktop/CMakeLists.txt:84 (find_package):
  By not providing "FindQt5Positioning.cmake" in CMAKE_MODULE_PATH this
  project has asked CMake to find a package configuration file provided by
  "Qt5Positioning", but CMake did not find one.

  Could not find a package configuration file provided by "Qt5Positioning"
  with any of the following names:

    Qt5PositioningConfig.cmake
    qt5positioning-config.cmake

  Add the installation prefix of "Qt5Positioning" to CMAKE_PREFIX_PATH or set
  "Qt5Positioning_DIR" to a directory containing one of the above files.  If
  "Qt5Positioning" provides a separate development package or SDK, be sure it
  has been installed.

CMake Error at src/cpp/desktop/CMakeLists.txt:84 (find_package):
  By not providing "FindQt5Positioning.cmake" in CMAKE_MODULE_PATH this
  project has asked CMake to find a package configuration file provided by
  "Qt5Positioning", but CMake did not find one.

  Could not find a package configuration file provided by "Qt5Positioning"
  with any of the following names:

    Qt5PositioningConfig.cmake
    qt5positioning-config.cmake

  Add the installation prefix of "Qt5Positioning" to CMAKE_PREFIX_PATH or set
  "Qt5Positioning_DIR" to a directory containing one of the above files.  If
  "Qt5Positioning" provides a separate development package or SDK, be sure it
  has been installed.

Решилось установкой qtpositioning. Потом аналогично qtsvg, qtxml. Добавлю это всё в зависимости.