easytag: use gnome defaultIconTheme

pkgs/applications/audio/easytag/default.nix

···
 { stdenv, fetchurl, pkgconfig, intltool, gtk3, glib, libid3tag, id3lib, taglib
 , libvorbis, libogg, flac, itstool, libxml2, gsettings_desktop_schemas
-, makeWrapper, gnome_icon_theme, dconf
+, makeWrapper, gnome3
 }:
 
 stdenv.mkDerivation rec {
···
   preFixup = ''
     wrapProgram $out/bin/easytag \
       --prefix XDG_DATA_DIRS : "$XDG_ICON_DIRS:$GSETTINGS_SCHEMAS_PATH:$out/share" \
-      --prefix GIO_EXTRA_MODULES : "${dconf}/lib/gio/modules"
+      --prefix GIO_EXTRA_MODULES : "${gnome3.dconf}/lib/gio/modules"
   '';
 
   NIX_LDFLAGS = "-lid3tag -lz";
···
   nativeBuildInputs = [ makeWrapper ];
   buildInputs = [
     pkgconfig intltool gtk3 glib libid3tag id3lib taglib libvorbis libogg flac
-    itstool libxml2 gsettings_desktop_schemas gnome_icon_theme dconf
+    itstool libxml2 gsettings_desktop_schemas gnome3.defaultIconTheme gnome3.dconf
   ];
 
   meta = {

pkgs/top-level/all-packages.nix

···
     inherit (xlibs) libX11 xproto;
   };
 
-  easytag = callPackage ../applications/audio/easytag {
-    inherit (gnome3) gnome_icon_theme dconf;
-  };
+  easytag = callPackage ../applications/audio/easytag { };
 
   mp3gain = callPackage ../applications/audio/mp3gain { };