Cannot add a Qt version in Kits tab

I get 'Qmake Not Executable' message box.  The proble comes from  commit 84befc2, 
which assumes that  `qmake -query` result must start with letter 'Q'.
That is not right in my case, as  'qmake -query' returns :

prefix:/home/qt/work/install
QT_SYSROOT:
QT_INSTALL_PREFIX:/home/piotr/QtEnt/5.15.5/android
QT_INSTALL_ARCHDATA:/home/piotr/QtEnt/5.15.5/android
QT_INSTALL_DATA:/home/piotr/QtEnt/5.15.5/android
...