add imv for viewing images when using river

home/desktop-river/default.nix

@@ -1,20 +1,6 @@
 { config, pkgs, ... }:
 
-let
+{
-  configure-gtk = let
-    schema = pkgs.gsettings-desktop-schemas;
-    datadir = "${schema}/share/gsettings-schemas/${schema.name}";
-    gsettings = "${pkgs.glib}/bin/gsettings";
-  in pkgs.writeScriptBin "configure-gtk" ''
-    #!${pkgs.dash}/bin/dash
-
-    export XDG_DATA_DIRS=${datadir}:$XDG_DATA_DIRS
-
-    ${gsettings} set org.gnome.desktop.interface gtk-theme 'gruvbox-dark'
-    ${gsettings} set org.gnome.desktop.interface icon-theme 'Papirus-Dark'
-    ${gsettings} set org.gnome.desktop.wm.preferences button-layout ""
-  '';
-in {
   imports = [
     ./bemenu.nix
     ./foot.nix
@@ -28,9 +14,9 @@ in {
   ];
 
   home.packages = with pkgs; [
-    configure-gtk
     glib
     gsettings-desktop-schemas
+    imv
     kile-wl
     light
     pamixer