I'm trying to port my old Qt4 plasmoid to Qt5 using QtQuick. When I want to test my first hello world plasmoid

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import QtQuick 2.0
import org.kde.plasma.plasmoid 2.0 as PlasmaComponents

PlasmaComponents.Label {
  text: "Hello World";
  color: "blue";
}


using

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qmlscene main.qml

I only get this error:

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file:///home/ralph/plasmoid/contents/ui/main.qml:2 module "org.kde.plasma.plasmoid" is not installed

I'm on Debian 11, and I checked every available package for this module, to no avail. Interestingly, the plasmoids supplied with KDE also contain this import statement, but work flawlessly.

Is someone here using Debian who might be able to help me?

I've just noticed that importing

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import org.kde.plasma.components 3.0 as PlasmaComponents

instead works fine. Maybe that one example I used was bad.