QMake build fails if build dir path has 4 parts

Steps to reproduce:

• Create a simple console app template (with qmake as build system)
• Change build directory to have 4 parts (5 with disk), e.g.: "c:\dev\build\default\Desktop"
• Try building

Expected:

• Project builds

Actual:

• "Error: dependent '..\..\..\..\..\Qt\6.6.2\msvc2019_64\include\QtCore\QCoreApplication' does not exist."

Found during testing of Qt Blog Post comment by "Game Over": https://www.qt.io/blog/qt-creator-13-released