bug#57479: Inkscape can't find python-lxml

[Leo Famulari <leo@famulari.name>]

I'm not able to create QR codes in Inkscape.

I try to create a QR code in Inkscape by going through these menus:
Extensions -> Render -> Barcode -> QR Code

But, when I click "Apply" to create the QR code, Inkscape prints an
error message like this:

------
Traceback (most recent call last):
  File "/gnu/store/crndrs40jrk5ddfxi7569123lbibhz42-inkscape-1.2.1/share/inkscape/extensions/render_barcode_qrcode.py", line 30, in <module>
    import inkex
  File "/gnu/store/crndrs40jrk5ddfxi7569123lbibhz42-inkscape-1.2.1/share/inkscape/extensions/inkex/__init__.py", line 11, in <module>
    from .extensions import *
  File "/gnu/store/crndrs40jrk5ddfxi7569123lbibhz42-inkscape-1.2.1/share/inkscape/extensions/inkex/extensions.py", line 34, in <module>
    from .elements import (
  File "/gnu/store/crndrs40jrk5ddfxi7569123lbibhz42-inkscape-1.2.1/share/inkscape/extensions/inkex/elements/__init__.py", line 9, in <module>
    from ._parser import SVG_PARSER, load_svg
  File "/gnu/store/crndrs40jrk5ddfxi7569123lbibhz42-inkscape-1.2.1/share/inkscape/extensions/inkex/elements/_parser.py", line 30, in <module>
    from lxml import etree
ModuleNotFoundError: No module named 'lxml'
------

Any ideas?