Missing libQt6QmlCore.so.6 in Linux PyQt6-Qt6 wheels

[Phil Thompson]

On 16/09/2026 12:26, pyqt-user.folic415 at passinbox.com wrote:
> Hi,
> 
> With PyQt6 6.9.0 and PyQt6-Qt6 6.9.0 on Linux, importing QtCore from
> QML fails. The wheel includes qml/QtCore/
> libqtqmlcoreplugin.so, which depends on libQt6QmlCore.so.6, but that
> library is missing.
> 
> On my machine, the loader falls back to the system Qt 6.11 library, 
> producing:
> 
> 
> libQt6Core.so.6: version 'Qt_6.11' not found
> (required by /lib64/libQt6QmlCore.so.6)
> 
> Minimal example:
> 
> from PyQt6.QtCore import QCoreApplication, QUrl
> from PyQt6.QtQml import QQmlEngine, QQmlComponent
> 
> app = QCoreApplication([])
> engine = QQmlEngine()
> component = QQmlComponent(engine)
> component.setData(b"import QtCore\nCameraPermission {}", QUrl())
> 
> for error in component.errors():
>     print(error.toString())
> 
> Inspecting the Linux x86_64 wheel for Qt 6.10.2 shows the same
> omission. Could QtQmlCore be missing from PyQt-
> builder’s bundled library dependencies?

Should be fixed in the next PyQt-builder release.

Thanks,
Phil