sage: ignore werkzeug immutable dict deprecation

pkgs/applications/science/math/sage/patches/ignore-werkzeug-immutable-dict-deprecation.patch

@@ -0,0 +1,12 @@
+diff --git a/src/sage/all.py b/src/sage/all.py
+index c87c9372e9..862fca4fcc 100644
+--- a/src/sage/all.py
++++ b/src/sage/all.py
+@@ -306,6 +306,7 @@ warnings.filters.remove(('ignore', None, DeprecationWarning, None, 0))
+ # Ignore all deprecations from IPython etc.
+ warnings.filterwarnings('ignore', category=DeprecationWarning,
+     module='.*(IPython|ipykernel|jupyter_client|jupyter_core|nbformat|notebook|ipywidgets|storemagic)')
++warnings.filterwarnings('ignore', category=DeprecationWarning, message=r".*The import 'werkzeug.ImmutableDict' is deprecated")
+ # Ignore collections.abc warnings, there are a lot of them but they are
+ # harmless.
+ warnings.filterwarnings('ignore', category=DeprecationWarning,

pkgs/applications/science/math/sage/sage-src.nix

@@ -107,6 +107,10 @@ stdenv.mkDerivation rec {
 
     # ignore a deprecation warning for usage of `cmp` in the attrs library in the doctests
     ./patches/ignore-cmp-deprecation.patch
+
+    # Werkzeug has deprecated ImmutableDict, but it is still used in legacy
+    # sagenb. That's no big issue since sagenb will be removed soon anyways.
+    ./patches/ignore-werkzeug-immutable-dict-deprecation.patch
   ];
 
   patches = nixPatches ++ bugfixPatches ++ packageUpgradePatches;