diff --git a/pkgs/development/python-modules/blessed/default.nix b/pkgs/development/python-modules/blessed/default.nix
index 98e27dccac5b..659f3523d5b3 100644
--- a/pkgs/development/python-modules/blessed/default.nix
+++ b/pkgs/development/python-modules/blessed/default.nix
@@ -1,41 +1,46 @@
 {
   lib,
   buildPythonPackage,
-  fetchPypi,
-  six,
+  fetchFromGitHub,
+  flit-core,
   wcwidth,
-  pytest,
+  six,
+  pytestCheckHook,
   mock,
   glibcLocales,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage {
   pname = "blessed";
-  version = "1.21.0";
-  format = "setuptools";
+  # We need https://github.com/jquast/blessed/pull/311 to fix 3.13
+  version = "1.25-unstable-2025-12-05";
+  pyproject = true;
 
-  src = fetchPypi {
-    inherit pname version;
-    hash = "sha256-7Oi7xHWKuRdkUvTjpxnXAIjrVzl5jNVYLJ4F8qKDN+w=";
+  src = fetchFromGitHub {
+    owner = "jquast";
+    repo = "blessed";
+    rev = "cee680ff7fb3ad31f42ae98582ba74629f1fd6b0";
+    hash = "sha256-4K1W0LXJKkb2wKE6D+IkX3oI5KxkpKbO661W/VTHgts=";
   };
 
+  build-system = [ flit-core ];
+
+  dependencies = [
+    wcwidth
+    six
+  ];
+
   nativeCheckInputs = [
-    pytest
+    pytestCheckHook
     mock
     glibcLocales
   ];
 
   # Default tox.ini parameters not needed
-  checkPhase = ''
+  preCheck = ''
     rm tox.ini
-    pytest
   '';
 
-  propagatedBuildInputs = [
-    wcwidth
-    six
-  ];
-
   meta = {
     homepage = "https://github.com/jquast/blessed";
     description = "Thin, practical wrapper around terminal capabilities in Python";