diff --git a/pkgs/development/python-modules/samarium/default.nix b/pkgs/development/python-modules/samarium/default.nix
index b175dc29708c..e75224ada3b3 100644
--- a/pkgs/development/python-modules/samarium/default.nix
+++ b/pkgs/development/python-modules/samarium/default.nix
@@ -7,7 +7,7 @@
   dahlia,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "samarium";
   version = "0.6.2";
   pyproject = true;
@@ -15,7 +15,7 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "samarium-lang";
     repo = "samarium";
-    tag = version;
+    tag = finalAttrs.version;
     hash = "sha256-sOkJ67B8LaIA2cwCHaFnc16lMG8uaegBJCzF6Li77vk=";
   };
 
@@ -26,10 +26,10 @@ buildPythonPackage rec {
   ];
 
   meta = {
-    changelog = "https://github.com/samarium-lang/samarium/blob/${src.rev}/CHANGELOG.md";
+    changelog = "https://github.com/samarium-lang/samarium/blob/${finalAttrs.src.tag}/CHANGELOG.md";
     description = "Samarium Programming Language";
     license = lib.licenses.mit;
     homepage = "https://samarium-lang.github.io/Samarium";
     maintainers = with lib.maintainers; [ sigmanificient ];
   };
-}
+})