diff --git a/pkgs/development/python-modules/python_docs_theme/default.nix b/pkgs/development/python-modules/python_docs_theme/default.nix
index 1e3776b906a..90cf78e4d69 100644
--- a/pkgs/development/python-modules/python_docs_theme/default.nix
+++ b/pkgs/development/python-modules/python_docs_theme/default.nix
@@ -1,9 +1,9 @@
-{ lib, buildPythonPackage, fetchFromGitHub, sphinx }:
+{ lib, buildPythonPackage, fetchFromGitHub, flit-core, sphinx }:
 
 buildPythonPackage rec {
   pname = "python_docs_theme";
   version = "2023.7";
-  format = "flit";
+  format = "pyproject";
 
   src = fetchFromGitHub {
     owner = "python";
@@ -12,6 +12,8 @@ buildPythonPackage rec {
     sha256 = "sha256-43/TlgYm7Q4ZtY25MiLU9fd1atDmiDUeUK6AYfDfmag=";
   };
 
+  nativeBuildInputs = [ flit-core ];
+
   propagatedBuildInputs = [ sphinx ];
 
   pythonImportsCheck = [ "python_docs_theme" ];