diff --git a/pkgs/development/python-modules/pwlf/default.nix b/pkgs/development/python-modules/pwlf/default.nix
index 71f7648401f3..af32fa29c70b 100644
--- a/pkgs/development/python-modules/pwlf/default.nix
+++ b/pkgs/development/python-modules/pwlf/default.nix
@@ -9,7 +9,7 @@
   unittestCheckHook,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "pwlf";
   version = "2.5.2";
   pyproject = true;
@@ -17,7 +17,7 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "cjekel";
     repo = "piecewise_linear_fit_py";
-    tag = "v${version}";
+    tag = "v${finalAttrs.version}";
     hash = "sha256-gN4AOmtezJ1310TVcKLsJ6rOtv0rGkQ6LjVluIeYEGQ=";
   };
 
@@ -38,8 +38,8 @@ buildPythonPackage rec {
   meta = {
     description = "Fit piecewise linear data for a specified number of line segments";
     homepage = "https://jekel.me/piecewise_linear_fit_py/";
-    changelog = "https://github.com/cjekel/piecewise_linear_fit_py/blob/${src.rev}/CHANGELOG.md";
+    changelog = "https://github.com/cjekel/piecewise_linear_fit_py/blob/${finalAttrs.src.tag}/CHANGELOG.md";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ doronbehar ];
   };
-}
+})