Previously installed Flatpak must be configured by adding [Flathub](https://flathub.org/ "Flathub Repository") repository: > flatpak remote-add --if-not-exists flathub [https://flathub.org/repo/flathub.flatpakrepo](https://flathub.org/repo/flathub.flatpakrepo) And setting default GTK theme: > flatpak override --filesystem=/usr/share/themes\ > flatpak override --env=GTK_THEME=Orchis [Next Step - Plymouth Setup](wiki:/s/ipenix-system/wiki/06.+Plymouth+Setup#null "06. Plymouth Setup")