Index: fenics-dolfinx/cpp/doc/Doxyfile
===================================================================
--- fenics-dolfinx.orig/cpp/doc/Doxyfile	2025-11-25 16:19:26.798809789 +0100
+++ fenics-dolfinx/cpp/doc/Doxyfile	2025-11-25 16:19:26.792981216 +0100
@@ -866,7 +866,7 @@
 # Possible values are: NO, YES and FAIL_ON_WARNINGS.
 # The default value is: NO.
 
-WARN_AS_ERROR          = YES
+WARN_AS_ERROR          = NO
 
 # The WARN_FORMAT tag determines the format of the warning messages that doxygen
 # can produce. The string should contain the $file, $line, and $text tags, which
Index: fenics-dolfinx/python/doc/source/conf.py
===================================================================
--- fenics-dolfinx.orig/python/doc/source/conf.py	2025-11-25 16:19:26.798809789 +0100
+++ fenics-dolfinx/python/doc/source/conf.py	2025-11-25 16:23:40.764062937 +0100
@@ -177,11 +177,11 @@
 intersphinx_mapping = {
     "petsc4py": (
         "https://petsc.org/release/petsc4py",
-        None,
+        ("/usr/share/doc/python-petsc4py-doc/html/objects.inv", None),
     ),
     "numpy": (
         f"https://numpy.org/doc/{numpy_doc_version}",
-        None,
+        ("/usr/share/doc/python-numpy/html/objects.inv", None),
     ),
     "pyvista": (
         "https://docs.pyvista.org",
@@ -189,19 +189,19 @@
     ),
     "mpi4py": (
         f"https://mpi4py.readthedocs.io/en/{mpi4py.__version__}",
-        None,
+        ("/usr/share/doc/python-mpi4py-doc/html/objects.inv", None),
     ),
     "basix": (
         f"https://docs.fenicsproject.org/basix/{basix_version}/python",
-        None,
+        ("/usr/share/doc/basix-doc/python/objects.inv", None),
     ),
     "ffcx": (
         f"https://docs.fenicsproject.org/ffcx/{ffcx_version}",
-        None,
+        ("/usr/share/doc/python-ffcx-doc/html/objects.inv", None),
     ),
     "ufl": (
         f"https://docs.fenicsproject.org/ufl/{ufl_version}",
-        None,
+        ("/usr/share/doc/python-ufl-doc/html/objects.inv", None),
     ),
 }