But where will GTK look for a theme of this name?

The answer is given in the freedesktop.org Icon Theme Specification! https://specifications.freedesktop.org/icon-theme/latest/

It will look in $HOME/.icons, all entries $XDG_DATA_DIRS (in the subdirectory icons/), and in /usr/share/pixmaps/.

It looks for subdirectories of the icon theme name you've set, and merge all contents it finds.

The $XDG_DATA_DIRS mechanism is especially important on #NixOS, because it allows you to dynamically reference the available themes there!

Hmm, is anyone else missing this icon in pavucontrol? (On more "bare-bones" window managers, maybe?)

I'm trying to figure which piece I'd need to fix here. I'm on #NixOS, but that doesn't seem to be the only reason. :D

This seems to be the "emblem-default" icon https://gitlab.freedesktop.org/pulseaudio/pavucontrol/-/blob/master/src/devicewidget.ui?ref_type=heads#L80 which Nix' adwaita-icon-theme doesn't seem to have anymore…

The nixpkgs derivation is here: https://github.com/NixOS/nixpkgs/blob/master/pkgs/by-name/pa/pavucontrol/package.nix

#gnome #gtk

Hmm, is anyone else missing this icon in pavucontrol? (On more "bare-bones" window managers, maybe?)

I'm trying to figure which piece I'd need to fix here. I'm on #NixOS, but that doesn't seem to be the only reason. :D

This seems to be the "emblem-default" icon https://gitlab.freedesktop.org/pulseaudio/pavucontrol/-/blob/master/src/devicewidget.ui?ref_type=heads#L80 which Nix' adwaita-icon-theme doesn't seem to have anymore…

The nixpkgs derivation is here: https://github.com/NixOS/nixpkgs/blob/master/pkgs/by-name/pa/pavucontrol/package.nix

#gnome #gtk

NixCon 2026 will take place in Kraków, Poland!
The SC approved the venue proposal: https://github.com/nixcon/nixcon-proposals/issues/6
#NixCon #NixCon2026 #Nix #NixOS