PyQt6 Designer plugin (libpyqt6.so) now available on conda-forge

[ludmila.klenov at neuf.fr]

‌Hello,

The conda-forge PyQt6 package now ships the Qt Designer plugin (libpyqt6.so) in all builds from version 6.11.0 build _1 onward.

Previously, conda-forge's PyQt builds did not include the designer plugin because Python is built without --enable-shared.

This meant that Qt Designer could not load any Python-based custom widgets — a long-standing issue for conda-forge users (StackOverflow #78340759).

To use it with conda-forge:

  mamba create -n myenv -c conda-forge "pyqt6=*=*_1" python=3.11 qt6-main

  mamba activate myenv

  designer

Then set PYQTDESIGNERPATH to your widget plugin directory.

The plugin is installed at $CONDA_PREFIX/lib/qt6/plugins/designer/libpyqt6.so and works on all platforms (linux-64, linux-aarch64, osx-64, osx-arm64, win-64) and Python 3.10–3.14.

The PyQt5 conda-forge package remains unchanged and does not include the plugin.


Thanks,

Ludmila KLENOV
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