Project does not compile if existing build folder was deleted

If you delete the existing build folder and try to build project, it won't compile (see attached screenshot). To make it work, you will need to either 1) do Build -> Rebuild Project or 2) do Build -> Clean Project or 3) close the project in Qt Creator, delete %projectname%.qbs.user file and reimport the project. For me, as for new qbs user, it is very annoying because qmake works normally in this case.

For your convenience I'm attaching a simple project which has both .pro and .qbs files.