Ah, thanks. Looks like a problem with uninstalled FreeCAD https://github.com/FreeCAD/FreeCAD/blob ... ts.txt#L62
Should be the same problem on an non-installed linux build as well.
EDIT: Yup, non-install issue, I'll try to fix it.
EDIT2: PR https://github.com/FreeCAD/FreeCAD/pull/1457