models-dev: refactor package.nix to use let-in for better readability

pkgs/by-name/mo/models-dev/package.nix

@@ -6,19 +6,19 @@
   nix-update-script,
   writableTmpDirAsHomeHook,
 }:
-stdenvNoCC.mkDerivation (finalAttrs: {
+let
   pname = "models-dev";
-  version = "0-unstable-2025-11-17";
+  version = "0-unstable-2025-11-20";
   src = fetchFromGitHub {
     owner = "sst";
     repo = "models.dev";
-    rev = "0cb3e3498ba712bd31528926d2efdd26e925267b";
-    hash = "sha256-ICMR59DaqriZZmO7260iuyMjuIRJ9AYtWlzVZY0KFXw=";
+    rev = "5389818cb714afeeca30ceef3c012498bba7f709";
+    hash = "sha256-ld/bWHJPGoDO7lyXnmGCzSt1f3A/JA8azJcj0C5HT8E=";
   };
 
   node_modules = stdenvNoCC.mkDerivation {
-    pname = "models-dev-node_modules";
-    inherit (finalAttrs) version src;
+    pname = "${pname}-node_modules";
+    inherit version src;
 
     impureEnvVars = lib.fetchers.proxyImpureEnvVars ++ [
       "GIT_PROXY_COMMAND"
@@ -69,13 +69,21 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     outputHashAlgo = "sha256";
     outputHashMode = "recursive";
   };
+in
+stdenvNoCC.mkDerivation (finalAttrs: {
+  inherit
+    pname
+    version
+    src
+    node_modules
+    ;
 
   nativeBuildInputs = [ bun ];
 
   configurePhase = ''
     runHook preConfigure
 
-    cp -R ${finalAttrs.node_modules}/. .
+    cp -R ${node_modules}/. .
 
     runHook postConfigure
   '';