Hi and welcome to devnet, AFAIK, the QtQuick Compiler is a licensed product so you should check with the Qt Company directly. On a side note, it's likely going to be a host tools like qmake or moc so one thing you can try is to copy the one you already have in the binary folder of our self-built Qt.

Hi, Currently the QtQuickCompiler is a licensed product, you should rather contact the Qt Company for these questions.