diff --git a/pkgs/development/python-modules/extract-msg/default.nix b/pkgs/development/python-modules/extract-msg/default.nix
index 171ee9acbd11..633218c3621b 100644
--- a/pkgs/development/python-modules/extract-msg/default.nix
+++ b/pkgs/development/python-modules/extract-msg/default.nix
@@ -1,19 +1,25 @@
 {
   lib,
-  beautifulsoup4,
   buildPythonPackage,
+  fetchFromGitHub,
+
+  # build-system
+  setuptools,
+
+  # dependencies
+  beautifulsoup4,
   compressed-rtf,
   ebcdic,
-  fetchFromGitHub,
   olefile,
-  pytestCheckHook,
   red-black-tree-mod,
   rtfde,
-  setuptools,
   tzlocal,
+
+  # tests
+  pytestCheckHook,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "extract-msg";
   version = "0.55.0";
   pyproject = true;
@@ -21,18 +27,17 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "TeamMsgExtractor";
     repo = "msg-extractor";
-    tag = "v${version}";
+    tag = "v${finalAttrs.version}";
     hash = "sha256-n/v3ubgzWlWqLXZfy1O7+FvTJoLMtgL7DFPL39SZnfM=";
   };
 
-  pythonRelaxDeps = [
-    "beautifulsoup4"
-    "olefile"
-    "red-black-tree-mod"
+  build-system = [
+    setuptools
   ];
 
-  build-system = [ setuptools ];
-
+  pythonRelaxDeps = [
+    "beautifulsoup4"
+  ];
   dependencies = [
     beautifulsoup4
     compressed-rtf
@@ -52,8 +57,8 @@ buildPythonPackage rec {
   meta = {
     description = "Extracts emails and attachments saved in Microsoft Outlook's .msg files";
     homepage = "https://github.com/TeamMsgExtractor/msg-extractor";
-    changelog = "https://github.com/TeamMsgExtractor/msg-extractor/blob/${src.tag}/CHANGELOG.md";
+    changelog = "https://github.com/TeamMsgExtractor/msg-extractor/blob/${finalAttrs.src.tag}/CHANGELOG.md";
     license = lib.licenses.gpl3Only;
     maintainers = with lib.maintainers; [ fab ];
   };
-}
+})