QCollator compare does not work on Android

Using QCollator::compare() on android for some locales does not work as expected:

QCollator collator(QLocale("nn_NO");
collator.setCaseSensitivity(Qt::CaseSensitive);
qDebug() << "compare(\"æ\", \"å\")=" << collator.compare(QString("æ"), QString("å"));

On Android:

W/Qt ( 7483): (null):0 ((null)): Only default locale supported with the posix collation implementation
D/Qt ( 7483): (null):0 ((null)): compare("æ", "å")= 1

Works fine/as expected on Linux:

compare("æ", "å")= -1