Background transparency for Gnome Terminal I'm trying to have transparency working for Gnome Terminal. However this is what I get when I try to edit the profile of gnome-temrinal: there's no background tab where I can set the opacity !? ![enter image description here]( I am using NixOs, this is what I have in my pkgs.nix file: environment.systemPackages = with pkgs; [ # ... gnome3.gnome_terminal gnome3.gconf # I have put it just in case it could help ] Any idea what I should install or configure so as to unlock the background transparency option ?

The GNOME terminal FAQ states:

> How can I make the terminal transparent?
>
> Since version 3.7 _(NixOS master currently contains version 3.26)_ this option has been removed from the Preferences dialogue. You can however still get the same effect by setting the _NET_WM_WINDOW_OPACITY X property, for example with the Devil's Pie or Devil's Pie II tools. E.g., set up Devil's Pie to start automatically with the session, and create the file ~/.devilspie/gnome-terminal.ds with these contents:
>
> (if (matches (window_name) "gnome-terminal-window-*") (opacity 90) )
>
> You can also use this shell script that however only works for existing terminal windows and not automatically for newly created ones. - <