diff --git a/pkgs/development/python-modules/telethon/default.nix b/pkgs/development/python-modules/telethon/default.nix
index b33247ebf0bb..93882deec67e 100644
--- a/pkgs/development/python-modules/telethon/default.nix
+++ b/pkgs/development/python-modules/telethon/default.nix
@@ -2,37 +2,34 @@
   lib,
   buildPythonPackage,
   fetchFromCodeberg,
-  pythonAtLeast,
   openssl,
   rsa,
   pyaes,
   cryptg,
-  setuptools,
+  hatchling,
   pytest-asyncio,
   pytestCheckHook,
 }:
 
 buildPythonPackage (finalAttrs: {
   pname = "telethon";
-  version = "1.42.0";
+  version = "1.44.0";
   pyproject = true;
 
   src = fetchFromCodeberg {
     owner = "Lonami";
     repo = "Telethon";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-NMHJkSTGR3/tck0k97EfVN9f85PAWst+EZ6G7Tgrt5s=";
+    hash = "sha256-NzLlDwxzLWyySluUazQGPDukT71awCrJZEbjd5T9K/g=";
   };
 
-  disabled = pythonAtLeast "3.14";
-
   postPatch = ''
     substituteInPlace telethon/crypto/libssl.py --replace-fail \
       "ctypes.util.find_library('ssl')" "'${lib.getLib openssl}/lib/libssl.so'"
   '';
 
   build-system = [
-    setuptools
+    hatchling
   ];
 
   dependencies = [
@@ -50,6 +47,15 @@ buildPythonPackage (finalAttrs: {
   ]
   ++ lib.concatAttrValues finalAttrs.passthru.optional-dependencies;
 
+  # TL objects (telethon/tl/functions.py etc.) are generated by the hatch build
+  # hook and only exist in the wheel; remove the source tree so tests import
+  # the installed package instead of the incomplete sources.
+  preCheck = ''
+    rm -r telethon
+  '';
+
+  pythonImportsCheck = [ "telethon" ];
+
   meta = {
     homepage = "https://codeberg.org/Lonami/Telethon";
     description = "Full-featured Telegram client library for Python 3";