We have not been installing icons since the Meson switch but now it caused the updated post-install script to crash:
gtk-update-icon-cache: Failed to open file /nix/store/czzwa7n5yg12gvmq0xg9l9d9s1ja4280-zenity-3.44.0/share/icons/hicolor/.icon-theme.cache : No such file or directory
https://gitlab.gnome.org/GNOME/zenity/-/compare/3.43.0...3.44.0
Changelog-Reviewed-By: Jan Tojnar <jtojnar@gmail.com>