diff --git a/pkgs/development/python-modules/firedrake/default.nix b/pkgs/development/python-modules/firedrake/default.nix
index 6fa7ef63a24a..d790c3315725 100644
--- a/pkgs/development/python-modules/firedrake/default.nix
+++ b/pkgs/development/python-modules/firedrake/default.nix
@@ -140,8 +140,9 @@ buildPythonPackage rec {
       # required by script spydump
       matplotlib
     ]
-    ++ pytools.optional-dependencies.siphash
-    ++ lib.optional stdenv.hostPlatform.isDarwin islpy;
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
+      islpy
+    ];
 
   postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -add_rpath ${libsupermesh}/${python.sitePackages}/libsupermesh/lib \
diff --git a/pkgs/development/python-modules/pyopencl/default.nix b/pkgs/development/python-modules/pyopencl/default.nix
index ce5a284b3017..65a6d25973ba 100644
--- a/pkgs/development/python-modules/pyopencl/default.nix
+++ b/pkgs/development/python-modules/pyopencl/default.nix
@@ -67,7 +67,7 @@ buildPythonPackage rec {
     mako
     pytestCheckHook
     writableTmpDirAsHomeHook
-  ] ++ pytools.optional-dependencies.siphash;
+  ];
 
   env = {
     CL_INC_DIR = "${opencl-headers}/include";
diff --git a/pkgs/development/python-modules/pytools/default.nix b/pkgs/development/python-modules/pytools/default.nix
index 625cb55badbd..8fc38098f3e5 100644
--- a/pkgs/development/python-modules/pytools/default.nix
+++ b/pkgs/development/python-modules/pytools/default.nix
@@ -13,31 +13,31 @@
 
 buildPythonPackage rec {
   pname = "pytools";
-  version = "2025.1.2";
+  version = "2025.1.5";
   pyproject = true;
 
   disabled = pythonOlder "3.8";
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-wA25T92aljmJlzLL+RvLKReGdRzJA4CwfXOBgspQ8rE=";
+    hash = "sha256-im+YrLBc6UGRu+j4WnPz7J7Ut2PBxpoHgQWeGgF8YeU=";
   };
 
   build-system = [ hatchling ];
 
   dependencies = [
     platformdirs
+    siphash24
     typing-extensions
   ];
 
   optional-dependencies = {
     numpy = [ numpy ];
-    siphash = [ siphash24 ];
   };
 
   nativeCheckInputs = [
     pytestCheckHook
-  ] ++ optional-dependencies.siphash;
+  ];
 
   pythonImportsCheck = [
     "pytools"