bug#70258: FreeCAD dependency probably outdated

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Dear Guix people,

I have checked FreeCAD on several machines and get the same error.

To reproduce:
- guix install freecad
- Open FreeCAD
- Create new document
- Select 'Draft' workbench

This produces an error:

  '<built-in function SoFieldContainer_getField> returned a result with an 
exception set'

The backtrace and also as some forums suggest (e.g., 
https://forum.freecad.org/viewtopic.php?t=74156) that the issue is the outdated 
'python-pivy'. The dependency version in python-xyz.scm is 0.6.5 released Jan 
12, 2020 where latest release 0.6.8 is from Aug 25, 2022.

I have tried to build newer version of 'python-pivy' but I hit some errors that 
I do not understand how to fix. The errors from build log among other things 
tell that it 'Could not find a package configuration file provided by "Qt5Core" 
with any of the following names: Qt5CoreConfig.cmake qt5core-config.cmake'.

Could somebody with more knowledge about building freecad help or give some 
suggestions how can I define latest 'python-pivy' (assuming the outdated 
package causes the 'Draft' workbench crash).

guix describe:

  guix 1dbe492
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 1dbe492b993a7629df3b35146ce0272b52913776