diff --git a/home-modules/firefox/default.nix b/home-modules/firefox/default.nix
index ea7c4c8..7f9bdc4 100644
--- a/home-modules/firefox/default.nix
+++ b/home-modules/firefox/default.nix
@@ -83,7 +83,7 @@ in {
     };
 
     settings = mkOption {
-      type = types.attrsOf (pkgs.formats.json.type
+      type = types.attrsOf ((pkgs.formats.json {}).type
         // {
           description = "Preferences (int, bool, string, and also attrs, list, float as a JSON string)";
         });
diff --git a/home/configurations.nix b/home/configurations.nix
index 6814c1b..687c166 100644
--- a/home/configurations.nix
+++ b/home/configurations.nix
@@ -8,7 +8,7 @@
 }: let
   pkgs = import nixpkgs rec {
     system = "x86_64-linux";
-    overlays = [(final: prev: {nixvim = nixvim.packages.${system}.default;}) nurpkgs.overlay];
+    overlays = [(final: prev: {nixvim = nixvim.packages.${system}.default;}) nurpkgs.overlays.default];
   };
 
   nur = import nurpkgs {