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I wanted to install a plugin, but it requires scipy. Thus I realized that QGIS use the default python3 installation. I tried to launch it from a conda virtual environment, as advised in this related stackexchange question, but I end up with the "Couldn't load SIP module." Issue#37783 (which isn't resolved imho).

My QGIS installation is system-wide (/usr/bin/qgis).

How can I make QGIS use a conda virtual environment for python libraries?

QGIS and OS versions

QGIS version 3.16.1-Hannover QGIS code revision b381a90dca
Compiled against Qt 5.12.8 Running against Qt 5.12.8
Compiled against GDAL/OGR 3.0.4 Running against GDAL/OGR 3.0.4
Compiled against GEOS 3.8.0-CAPI-1.13.1 Running against GEOS 3.8.0-CAPI-1.13.1
Compiled against SQLite 3.31.1 Running against SQLite 3.31.1
PostgreSQL Client Version 12.5 (Ubuntu 12.5-0ubuntu0.20.04.1) SpatiaLite Version 4.3.0a
QWT Version 6.1.4 QScintilla2 Version 2.11.2
Compiled against PROJ 6.3.1 Running against PROJ Rel. 6.3.1, February 10th, 2020
OS Version Ubuntu 20.04.1 LTS
Active python plugins openlayers_plugin; MetaSearch; processing

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Installing QGIS with conda should do the trick https://anaconda.org/conda-forge/qgis

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  • Currently, this version conflicts with local Qt installation on Ubuntu. So you either need to change your library path, or install on its own environment.
    – Jose
    Sep 16, 2021 at 15:11

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