> I think it was related with vtk being updated to 9.0.0. > > I'll package it back to 8.2.0 and see what happens. > > https://forum.freecadweb.org/viewtopic.php?style=4&f=4&t=46934&start=10 > > I'll keep you all informed. > Thanks for the help! I think I have it working for the latest Guix version. Please, try with this file. WARNING: it's going to take ages to compile. I had to re-package vtk for this case. There was a problem with the latest version of Guix, because it includes vtk9.0.0 and freecad is not compatible with that... Hope this works as expected. Please tell me if it works fine and if it does I'll submit a patch Cheers!