diff --git a/pkgs/development/python-modules/pydicom/default.nix b/pkgs/development/python-modules/pydicom/default.nix
index 0a8ca2dcf87c..0d8e5cd4fae0 100644
--- a/pkgs/development/python-modules/pydicom/default.nix
+++ b/pkgs/development/python-modules/pydicom/default.nix
@@ -26,7 +26,7 @@ let
     hash = "sha256-ji7SppKdiszaXs8yCSIPkJj4Ld++XWNw9FuxLoFLfFo=";
   };
 in
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "pydicom";
   version = "3.0.1";
   pyproject = true;
@@ -34,7 +34,7 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "pydicom";
     repo = "pydicom";
-    tag = "v${version}";
+    tag = "v${finalAttrs.version}";
     hash = "sha256-SvRevQehRaSp+vCtJRQVEJiC5noIJS+bGG1/q4p7/XU=";
   };
 
@@ -60,7 +60,7 @@ buildPythonPackage rec {
     pytestCheckHook
     writableTmpDirAsHomeHook
   ]
-  ++ optional-dependencies.pixeldata;
+  ++ finalAttrs.passthru.optional-dependencies.pixeldata;
 
   passthru.pydicom-data = test_data;
 
@@ -105,7 +105,7 @@ buildPythonPackage rec {
     description = "Python package for working with DICOM files";
     mainProgram = "pydicom";
     homepage = "https://pydicom.github.io";
-    changelog = "https://github.com/pydicom/pydicom/releases/tag/v${version}";
+    changelog = "https://github.com/pydicom/pydicom/releases/tag/${finalAttrs.src.tag}";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ bcdarwin ];
     badPlatforms = [
@@ -117,4 +117,4 @@ buildPythonPackage rec {
       lib.systems.inspect.patterns.isDarwin
     ];
   };
-}
+})