Index: fenics-dolfinx/python/pyproject.toml
===================================================================
--- fenics-dolfinx.orig/python/pyproject.toml	2025-11-12 15:50:20.856626485 +0100
+++ fenics-dolfinx/python/pyproject.toml	2025-11-12 15:50:20.848499063 +0100
@@ -22,6 +22,7 @@
 dependencies = [
       "numpy>=1.21",
       "cffi",
+      "nanobind",
       "mpi4py",
       "fenics-basix>=0.10.0,<0.11.0",
       "fenics-ffcx>=0.10.0,<0.11.0",