diff --git a/pkgs/development/python-modules/pythonocc-core/default.nix b/pkgs/development/python-modules/pythonocc-core/default.nix
index f1d84712b27..5fa1b2d9b39 100644
--- a/pkgs/development/python-modules/pythonocc-core/default.nix
+++ b/pkgs/development/python-modules/pythonocc-core/default.nix
@@ -48,6 +48,12 @@ stdenv.mkDerivation rec {
     "-DPYTHONOCC_WRAP_SMESH=TRUE"
   ];
 
+  passthru = {
+    # `python3Packages.pythonocc-core` must be updated in tandem with
+    # `opencascade-occt`, and including it in the bulk updates often breaks it.
+    skipBulkUpdate = true;
+  };
+
   meta = with lib; {
     description = "Python wrapper for the OpenCASCADE 3D modeling kernel";
     homepage = "https://github.com/tpaviot/pythonocc-core";