The current implementation only checks that the regex ^qt-cmake(
.bat)?$ matches the path that you give it and ignores whether the file exists or not. So the "does qt-cmake exist?" verification passes but the file actually doesn't exist.

So if you manually write the qt-cmake location to be, for example, /Users/ollivuolteenaho/qt-cmake-isnt-here-man building the project will fail.

The result for the user on the first "Built Qt Project" execution is an empty QtBuild output with no errors (the IDE error occurred is not related).