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 ``` And setting default GTK theme: ``` flatpak override --filesystem=/usr/share/themes flatpak override --env=GTK_THEME=Orchis ``` [Next Step - Plymouth Config](wiki:/s/ipenix-system/wiki/08.+Plymouth+Config#null "08. Plymouth Config")