diff --git a/pkgs/development/python-modules/pkuseg/default.nix b/pkgs/development/python-modules/pkuseg/default.nix
deleted file mode 100644
index a74da172d232..000000000000
--- a/pkgs/development/python-modules/pkuseg/default.nix
+++ /dev/null
@@ -1,38 +0,0 @@
-{
-  lib,
-  buildPythonPackage,
-  fetchPypi,
-  isPy3k,
-  pythonAtLeast,
-  cython,
-  numpy,
-}:
-
-buildPythonPackage rec {
-  pname = "pkuseg";
-  version = "0.0.25";
-  format = "setuptools";
-
-  disabled = !isPy3k || pythonAtLeast "3.9";
-
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "148yp0l7h8cflxag62pc1iwj5b5liyljnaxwfjaiqwl96vwjn0fx";
-  };
-
-  # Does not seem to have actual tests, but unittest discover
-  # recognizes some non-tests as tests and fails.
-  doCheck = false;
-
-  nativeBuildInputs = [ cython ];
-
-  propagatedBuildInputs = [ numpy ];
-
-  pythonImportsCheck = [ "pkuseg" ];
-
-  meta = {
-    description = "Toolkit for multi-domain Chinese word segmentation";
-    homepage = "https://github.com/lancopku/pkuseg-python";
-    license = lib.licenses.unfree;
-  };
-}
diff --git a/pkgs/top-level/python-aliases.nix b/pkgs/top-level/python-aliases.nix
index 80da110b0254..98ac4465a8c0 100644
--- a/pkgs/top-level/python-aliases.nix
+++ b/pkgs/top-level/python-aliases.nix
@@ -314,6 +314,7 @@ mapAliases {
   percol = throw "percol has been removed because it hasn't been updated since 2019"; # added 2025-05-25
   pillow-avif-plugin = throw "'pillow-avif-plugin' has been removed because 'pillow' has native avif support since 11.3"; # added 2025-11-26
   pizzapi = throw "pizzapi was removed because it no longer works"; # added 2025-12-03
+  pkuseg = throw "'pkuseg' has been removed because it was not supported on newer versions of Python"; # added 2026-01-20
   plumlightpad = throw "plumlightpad has been removed because the API was shut down"; # added 2025-11-04
   Polygon3 = throw "'Polygon3' has been renamed to/replaced by 'polygon3'"; # Converted to throw 2025-10-29
   posix_ipc = throw "'posix_ipc' has been renamed to/replaced by 'posix-ipc'"; # Converted to throw 2025-10-29
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index cc6849e4cf16..ac99f20d84ee 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -12294,8 +12294,6 @@ self: super: with self; {
 
   pkgutil-resolve-name = callPackage ../development/python-modules/pkgutil-resolve-name { };
 
-  pkuseg = callPackage ../development/python-modules/pkuseg { };
-
   plac = callPackage ../development/python-modules/plac { };
 
   plaid-python = callPackage ../development/python-modules/plaid-python { };