Qt's MOC fails if there are 2+ files with the same name

.
├── GlobalKeysImpl.cpp
├── GlobalKeysImpl.hpp
├── fake
│   ├── Keys.cpp
│   └── Keys.hpp
└── macos
    ├── Keys.hpp
    └── Keys.mm

ERROR: ~/project/build/release/genmodules/Qt/ebbf654a33ba1444/modules/Qt/core/core.qbs:326:18 Conflicting instances of rule '[cpp,hpp,moc_cpp,qt.core.metatypes.in,unmocable][hpp]':
Output artifact '~/project/build/release/lib-globalkeys.2b19d184/qt.headers/moc_Keys.cpp' is to be produced from input artifacts '~/project/libs/globalkeys/src/macos/Keys.hpp' and '~/project/libs/globalkeys/src/fake/Keys.hpp', but the rule is not a multiplex rule.