diff --git a/pkgs/development/python-modules/llama-index-core/default.nix b/pkgs/development/python-modules/llama-index-core/default.nix
index 3abc057181ab..f05ecd885a29 100644
--- a/pkgs/development/python-modules/llama-index-core/default.nix
+++ b/pkgs/development/python-modules/llama-index-core/default.nix
@@ -36,7 +36,7 @@
   typing-inspect,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "llama-index-core";
   version = "0.14.12";
   pyproject = true;
@@ -44,11 +44,11 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "run-llama";
     repo = "llama_index";
-    tag = "v${version}";
+    tag = "v${finalAttrs.version}";
     hash = "sha256-grF9IToAMc3x5/40+u3lHU9RyjROWu1e3M6N1owq0f4=";
   };
 
-  sourceRoot = "${src.name}/${pname}";
+  sourceRoot = "${finalAttrs.src.name}/${finalAttrs.pname}";
 
   # When `llama-index` is imported, it uses `nltk` to look for the following files and tries to
   # download them if they aren't present.
@@ -160,8 +160,8 @@ buildPythonPackage rec {
   meta = {
     description = "Data framework for your LLM applications";
     homepage = "https://github.com/run-llama/llama_index/";
-    changelog = "https://github.com/run-llama/llama_index/blob/${src.tag}/CHANGELOG.md";
+    changelog = "https://github.com/run-llama/llama_index/blob/${finalAttrs.src.tag}/CHANGELOG.md";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ fab ];
   };
-}
+})