diff --git a/pkgs/tools/misc/blacken-docs/default.nix b/pkgs/development/python-modules/blacken-docs/default.nix
similarity index 73%
rename from pkgs/tools/misc/blacken-docs/default.nix
rename to pkgs/development/python-modules/blacken-docs/default.nix
index 434f684b78d2..7370471c2604 100644
--- a/pkgs/tools/misc/blacken-docs/default.nix
+++ b/pkgs/development/python-modules/blacken-docs/default.nix
@@ -1,12 +1,16 @@
-{ black
-, fetchFromGitHub
-, lib
-, python3
+{
+  black,
+  buildPythonPackage,
+  fetchFromGitHub,
+  lib,
+  pytestCheckHook,
+  setuptools,
 }:
-python3.pkgs.buildPythonApplication rec {
+
+buildPythonPackage rec {
   pname = "blacken-docs";
   version = "1.15.0";
-  format = "pyproject";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "adamchainz";
@@ -15,17 +19,16 @@ python3.pkgs.buildPythonApplication rec {
     hash = "sha256-3FGuFOAHCcybPwujWlh58NWtuF5CebaKTgBWgCGpSL8=";
   };
 
-  nativeBuildInputs = [
-    python3.pkgs.setuptools
+  build-system = [
+    setuptools
   ];
 
-  propagatedBuildInputs = [
+  dependencies = [
     black
   ];
 
   nativeCheckInputs = [
-    black
-    python3.pkgs.pytestCheckHook
+    pytestCheckHook
   ];
 
   meta = with lib; {
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index c874ee7429e3..cce8fa3b248f 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -6605,7 +6605,7 @@ with pkgs;
 
   bbin = callPackage ../development/tools/bbin { };
 
-  blacken-docs = callPackage ../tools/misc/blacken-docs { };
+  blacken-docs = with python3Packages; toPythonApplication blacken-docs;
 
   bore = callPackage ../tools/networking/bore {
     inherit (darwin) Libsystem;
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 74cb990650ae..62bcc9a550c7 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -1667,6 +1667,8 @@ self: super: with self; {
 
   black = callPackage ../development/python-modules/black { };
 
+  blacken-docs = callPackage ../development/python-modules/blacken-docs { };
+
   blackjax = callPackage ../development/python-modules/blackjax { };
 
   black-macchiato = callPackage ../development/python-modules/black-macchiato { };