diff --git a/pkgs/development/python-modules/json5/default.nix b/pkgs/development/python-modules/json5/default.nix
index 8d035f86f56f..c90c6f797626 100644
--- a/pkgs/development/python-modules/json5/default.nix
+++ b/pkgs/development/python-modules/json5/default.nix
@@ -6,7 +6,7 @@
   setuptools,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "json5";
   version = "0.15.0";
   pyproject = true;
@@ -14,7 +14,7 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "dpranke";
     repo = "pyjson5";
-    tag = "v${version}";
+    tag = "v${finalAttrs.version}";
     hash = "sha256-/Y8/IA3j5CJutqMM5fI/bWZrxOHWsEdYfuvWPTjFAJk=";
   };
 
@@ -27,9 +27,9 @@ buildPythonPackage rec {
   meta = {
     description = "Python implementation of the JSON5 data format";
     homepage = "https://github.com/dpranke/pyjson5";
-    changelog = "https://github.com/dpranke/pyjson5/releases/tag/${src.tag}";
+    changelog = "https://github.com/dpranke/pyjson5/releases/tag/${finalAttrs.src.tag}";
     license = lib.licenses.asl20;
     maintainers = with lib.maintainers; [ veehaitch ];
     mainProgram = "pyjson5";
   };
-}
+})