1 files changed, 6 insertions, 4 deletions
diff --git a/pkgs/development/python-modules/tornado/default.nix b/pkgs/development/python-modules/tornado/default.nix
index afb6eeef5db39..38afe65df6cf2 100644
--- a/pkgs/development/python-modules/tornado/default.nix
+++ b/pkgs/development/python-modules/tornado/default.nix
@@ -1,8 +1,8 @@
 {
   lib,
-  python,
   buildPythonPackage,
   fetchFromGitHub,
+  setuptools,
   pytestCheckHook,
 
   # for passthru.tests
@@ -20,16 +20,18 @@
 
 buildPythonPackage rec {
   pname = "tornado";
-  version = "6.3.3";
-  format = "setuptools";
+  version = "6.4.1";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "tornadoweb";
     repo = "tornado";
     rev = "v${version}";
-    hash = "sha256-l9Ce/c2wDSmsySr9yXu5Fl/+63QkQay46aDSUTJmetA=";
+    hash = "sha256-vWiTLKL5gzrf3J6T3u8I1HHg5Ww0sf5ybSbZX6G3UXM=";
   };
 
+  build-system = [ setuptools ];
+
   nativeCheckInputs = [ pytestCheckHook ];
 
   disabledTestPaths = [