Error linking qt libraries with WASM clocks demo (no such file or directory)

The problem can be reproduced using the qt provided clocks demo project (clocks.pro)[built on macOS Bug Sur (11.6.7)]

Gives the error:

em++: error: /Users/qt/work/qt/qtbase/build/target/plugins/platforms/libqwasm.a: No such file or directory ("/Users/qt/work/qt/qtbase/build/target/plugins/platforms/libqwasm.a" was expected to be an input file, based on the commandline arguments provided) 

It appear that the loading code is using a fixed qt folder for locating the qt libraries rather than the Qt install directory.