diff --git a/pkgs/desktops/gnome-3/extensions/system-monitor/default.nix b/pkgs/desktops/gnome-3/extensions/system-monitor/default.nix
index 01b3fbad7c2f..eed34ae523d4 100644
--- a/pkgs/desktops/gnome-3/extensions/system-monitor/default.nix
+++ b/pkgs/desktops/gnome-3/extensions/system-monitor/default.nix
@@ -1,6 +1,4 @@
-# This package needs the following configuration in configuration.nix:
-# services.xserver.desktopManager.gnome3.sessionPath = [ pkgs.libgtop pkgs.glib_networking ];
-{ config, stdenv, fetchFromGitHub, glib, glib_networking, libgtop, pkgs }:
+{ config, stdenv, substituteAll, fetchFromGitHub, glib, glib_networking, libgtop, pkgs }:
 
 stdenv.mkDerivation rec {
   name = "gnome-shell-system-monitor-${version}";
@@ -19,7 +17,13 @@ stdenv.mkDerivation rec {
     libgtop
   ];
 
-  patches = [ ./remove_nonexisting_mounts.patch ];
+  patches = [
+    (substituteAll {
+      src = ./paths_and_nonexisting_dirs.patch;
+      gtop_path = "${libgtop}/lib/girepository-1.0";
+      glib_net_path = "${glib_networking}/lib/girepository-1.0";
+    })
+  ];
 
   buildPhase = ''
     ${glib.dev}/bin/glib-compile-schemas --targetdir=${uuid}/schemas ${uuid}/schemas
diff --git a/pkgs/desktops/gnome-3/extensions/system-monitor/remove_nonexisting_mounts.patch b/pkgs/desktops/gnome-3/extensions/system-monitor/paths_and_nonexisting_dirs.patch
similarity index 52%
rename from pkgs/desktops/gnome-3/extensions/system-monitor/remove_nonexisting_mounts.patch
rename to pkgs/desktops/gnome-3/extensions/system-monitor/paths_and_nonexisting_dirs.patch
index 8bff7fbe24fe..82e3d7c541ba 100644
--- a/pkgs/desktops/gnome-3/extensions/system-monitor/remove_nonexisting_mounts.patch
+++ b/pkgs/desktops/gnome-3/extensions/system-monitor/paths_and_nonexisting_dirs.patch
@@ -1,8 +1,18 @@
 diff --git a/system-monitor@paradoxxx.zero.gmail.com/extension.js b/system-monitor@paradoxxx.zero.gmail.com/extension.js
-index b4b7f15..d645654 100644
+index b4b7f15..d139135 100644
 --- a/system-monitor@paradoxxx.zero.gmail.com/extension.js
 +++ b/system-monitor@paradoxxx.zero.gmail.com/extension.js
-@@ -386,7 +386,7 @@ const smMountsMonitor = new Lang.Class({
+@@ -18,6 +18,9 @@
+ 
+ // Author: Florian Mounier aka paradoxxxzero
+ 
++imports.gi.GIRepository.Repository.prepend_search_path('@gtop_path@');
++imports.gi.GIRepository.Repository.prepend_search_path('@glib_net_path@');
++
+ /* Ugly. This is here so that we don't crash old libnm-glib based shells unnecessarily
+  * by loading the new libnm.so. Should go away eventually */
+ const libnm_glib = imports.gi.GIRepository.Repository.get_default().is_registered("NMClient", "1.0");
+@@ -386,7 +389,7 @@ const smMountsMonitor = new Lang.Class({
      connected: false,
      _init: function () {
          this._volumeMonitor = Gio.VolumeMonitor.get();