Configuring top-level build on Ubuntu 18.04 without pkg-config fails in qtsensors

configure -top-level -prefix /home/vagrant/qt-everywhere-src-6.2.0 -no-gui
[...]
Sensorfw pkg not found. Looking for library
CMake Error at qtsensors/cmake/FindSensorfw.cmake:9 (find_library):
  find_library called with incorrect number of arguments
Call Stack (most recent call first):
  qtbase/cmake/QtFindPackageHelpers.cmake:130 (find_package)
  qtsensors/src/sensors/configure.cmake:10 (qt_find_package)
  qtbase/cmake/QtModuleHelpers.cmake:511 (include)
  qtsensors/src/sensors/CMakeLists.txt:5 (qt_internal_add_module)