diff --git a/configuration.nix b/configuration.nix
index c6a053f..69fc90a 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -164,11 +164,11 @@
 #  nix.optimise.automatic = true;
 
   # Automatic Garbage Collection
-  nix.gc = {
-    automatic = true;
-    dates = "weekly";
-    options = "--delete-older-than 15d";
-  };
+#  nix.gc = {
+#    automatic = true;
+#    dates = "weekly";
+#    options = "--delete-older-than 15d";
+#  };
 
   nix.settings.experimental-features = [ "nix-command" "flakes" ];
 
diff --git a/desktop_environnement.nix b/desktop_environnement.nix
index 8e5d013..1dcdc51 100644
--- a/desktop_environnement.nix
+++ b/desktop_environnement.nix
@@ -15,6 +15,12 @@
       # Enable XWayland support in COSMIC
       xwayland.enable = lib.mkDefault true;
     };
+    # to avoid a timeout on shutdown, enable the GeoClue 2 service without the demo agent
+    # will not be needed in future version of cosmic : testing or 25.11
+    geoclue2 = {
+      enable = true;
+      enableDemoAgent = false;
+    };
   };
 
   environment.sessionVariables = {
diff --git a/flake.lock b/flake.lock
index dcedf01..b45abd4 100644
--- a/flake.lock
+++ b/flake.lock
@@ -70,11 +70,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1749237914,
-        "narHash": "sha256-N5waoqWt8aMr/MykZjSErOokYH6rOsMMXu3UOVH5kiw=",
+        "lastModified": 1749857119,
+        "narHash": "sha256-tG5xUn3hFaPpAHYIvr2F88b+ovcIO5k1HqajFy7ZFPM=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "70c74b02eac46f4e4aa071e45a6189ce0f6d9265",
+        "rev": "5f4f306bea96741f1588ea4f450b2a2e29f42b98",
         "type": "github"
       },
       "original": {