message: Check that both pyside2 and shiboken2 are found
  * It seems like packaging of these two is inconsistent, and pyside2 dev files
  being available doesn't always imply shiboken2 dev files are present. Be safe
  and check both.
diff: @@ -215,7 +215,7 @@ if(NOT BUILD_VERSION_DIST_CONTACT STREQUAL "")
  "DEFINES+=DISTRIBUTION_CONTACT='\\\\\"${BUILD_VERSION_DIST_CONTACT}\\\\\"'\n")
  endif()
  -if(PySide2_FOUND)
  +if(PySide2_FOUND AND Shiboken2_FOUND)
  message(STATUS "Building with PySide2 ${PySide2_VERSION} from ${PySide2_DIR}")
  get_target_property(SHIBOKEN2_INCLUDE_DIRS Shiboken2::libshiboken INTERFACE_INCLUDE_DIRECTORIES)
  