The "virt-install" command requires the "gi.repository" module, which is provided by the "pygobject3-base" package.  If this package is not installed, virt-install fails with:

Traceback (most recent call last):
  File "/usr/share/virt-manager/virt-install", line 29, in <module>
    import virtinst
  File "/usr/share/virt-manager/virtinst/__init__.py", line 85, in <module>
    from virtinst.distroinstaller import DistroInstaller
  File "/usr/share/virt-manager/virtinst/distroinstaller.py", line 28, in <module>
    from . import osdict
  File "/usr/share/virt-manager/virtinst/osdict.py", line 26, in <module>
    from gi.repository import Libosinfo as libosinfo
ImportError: No module named gi.repository

The spec file should be updated to add the required dependency.