Index: fenics-dolfinx/python/pyproject.toml
===================================================================
--- fenics-dolfinx.orig/python/pyproject.toml	2025-09-11 10:01:01.058444028 +0200
+++ fenics-dolfinx/python/pyproject.toml	2025-09-11 10:01:56.657626065 +0200
@@ -22,6 +22,7 @@
 dependencies = [
       "numpy>=1.21",
       "cffi",
+      "nanobind",
       "mpi4py",
       "fenics-basix>=0.9.0,<0.10.0",
       "fenics-ffcx>=0.9.0,<0.10.0",