diff --git a/nix/configurations/vanadium/home/misc.nix b/nix/configurations/vanadium/home/misc.nix
index a9087188..c9271621 100644
--- a/nix/configurations/vanadium/home/misc.nix
+++ b/nix/configurations/vanadium/home/misc.nix
@@ -54,7 +54,8 @@
 
   xdg.mimeApps = {
     enable = true;
-    associations.added."x-scheme-handler/mailto" = ["org.gnome.Evolution.desktop"];
-    defaultApplications."x-scheme-handler/mailto" = ["org.gnome.Evolution.desktop"];
+    defaultApplications = {
+      "x-scheme-handler/mailto" = ["org.gnome.Evolution.desktop"];
+    };
   };
 }