diff --git a/pkgs/development/python-modules/tiered-debug/default.nix b/pkgs/development/python-modules/tiered-debug/default.nix
index 84554ab49520..75937691c058 100644
--- a/pkgs/development/python-modules/tiered-debug/default.nix
+++ b/pkgs/development/python-modules/tiered-debug/default.nix
@@ -7,7 +7,7 @@
   pytest-cov-stub,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "tiered-debug";
   version = "1.5.1";
   pyproject = true;
@@ -15,7 +15,7 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "untergeek";
     repo = "tiered-debug";
-    tag = "v${version}";
+    tag = "v${finalAttrs.version}";
     hash = "sha256-PIqRReT+m5nlq9koD88XJMeUvUsRwrXCqZDTylZGgPg=";
   };
 
@@ -37,8 +37,8 @@ buildPythonPackage rec {
   meta = {
     description = "Python logging helper module that allows for multiple tiers of debug logging";
     homepage = "https://github.com/untergeek/tiered-debug";
-    changelog = "https://github.com/untergeek/tiered-debug/releases/tag/${src.tag}";
+    changelog = "https://github.com/untergeek/tiered-debug/releases/tag/${finalAttrs.src.tag}";
     license = lib.licenses.asl20;
     maintainers = with lib.maintainers; [ fab ];
   };
-}
+})