gnucash w/ python output

gistfile1.txt

$ gnucash                                                                                                                                                                                                                                   

(gnucash:357): Gtk-WARNING **: 20:39:03.390: Could not load a pixbuf from /org/gtk/libgtk/theme/Adwaita/assets/check-symbolic.svg.                                                                                                                                            
This may indicate that pixbuf loaders or the mime database could not be found.
Traceback (most recent call last):                                                                                                                                                                                                                                            
  File "/nix/store/ymwjsc0pimjqzjxv07p4sng1qb9mpa86-gnucash-3.4/share/gnucash/python/init.py", line 6, in <module>
    require_version('Gtk', '3.0')                                                                                                                                                                                                                                             
  File "/nix/store/8lp12492k8lc1vwz1j2s3m9czd4fk09g-python3-3.7.3-env/lib/python3.7/site-packages/gi/__init__.py", line 129, in require_version
    raise ValueError('Namespace %s not available' % namespace)                                                                                                                                                                                                                
ValueError: Namespace Gtk not available