diff --git a/home-manager/progs/gpt4all/gpt4all.nix b/home-manager/progs/gpt4all/gpt4all.nix
index ef222f8..2d502f8 100644
--- a/home-manager/progs/gpt4all/gpt4all.nix
+++ b/home-manager/progs/gpt4all/gpt4all.nix
@@ -39,9 +39,7 @@ let
   model_files = builtins.listToAttrs (
     map (f: {
       name = ".local/share/nomic.ai/GPT4All/${f.name}";
-      value = {
-        source = f.source;
-      };
+      value.source = f.source;
     }) models
   );
 
@@ -49,7 +47,7 @@ let
     optimizeWithFlags
       (pkgs.gpt4all.overrideAttrs (old: {
         # https://github.com/NixOS/nixpkgs/pull/344001 3.2.1 -> 3.3.0
-        version = "3.3.0";
+        version = "3.4.0-dev0";
         src = pkgs.fetchFromGitHub {
           fetchSubmodules = true;
           owner = "nomic-ai";
@@ -72,7 +70,6 @@ let
         "-fno-finite-math-only" # https://github.com/ggerganov/llama.cpp/pull/7154#issuecomment-2143844461
       ]
   );
-
 in
 {
   home.packages = [
@@ -92,7 +89,10 @@ in
         suggestionMode=Off
         threadCount=8
         uniqueId=7096f2d2-448d-4272-a132-d37e77f8a781
-        userDefaultModel=${(builtins.elemAt models 0).name}
+        userDefaultModel=${
+          # select the first element of `models` to be the default model
+          (builtins.elemAt models 0).name
+        }
         width=1472
         x=0
         y=0