diff --git a/nix/configurations/vanadium/home/misc.nix b/nix/configurations/vanadium/home/misc.nix
index 33210803..7fc0c785 100644
--- a/nix/configurations/vanadium/home/misc.nix
+++ b/nix/configurations/vanadium/home/misc.nix
@@ -55,10 +55,15 @@
     type = "fcitx5";
   };
 
-  xdg.mimeApps = {
-    enable = true;
-    defaultApplications = {
-      "x-scheme-handler/mailto" = [ "org.gnome.Evolution.desktop" ];
+  xdg.mimeApps =
+    let
+      associations = {
+        "x-scheme-handler/mailto" = [ "org.gnome.Evolution.desktop" ];
+      };
+    in
+    {
+      enable = true;
+      associations.added = associations;
+      defaultApplications = associations;
     };
-  };
 }