From f8cece6719e90e24624a4d303571e528b0a4d0a7 Mon Sep 17 00:00:00 2001
From: Bouwe Andela <b.andela@esciencecenter.nl>
Date: Wed, 20 Aug 2025 17:41:46 +0200
Subject: [PATCH] Use latest iris with correct derived coordinates loading

---
 environment.yml              | 2 +-
 esmvalcore/config/_config.py | 1 +
 pyproject.toml               | 2 +-
 3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/environment.yml b/environment.yml
index 3360a4a8e9..10881287c3 100644
--- a/environment.yml
+++ b/environment.yml
@@ -21,7 +21,7 @@ dependencies:
   - geopy
   - humanfriendly
   - intake-esm
-  - iris >=3.12.2  # https://github.com/SciTools/iris/issues/6417
+  - iris >=3.13
   - iris-esmf-regrid >=0.11.0
   - iris-grib >=0.20.0  # github.com/ESMValGroup/ESMValCore/issues/2535
   - isodate >=0.7.0  # incompatible with very old 0.6.1
diff --git a/esmvalcore/config/_config.py b/esmvalcore/config/_config.py
index 1157dc88c8..ac13a927fe 100644
--- a/esmvalcore/config/_config.py
+++ b/esmvalcore/config/_config.py
@@ -34,6 +34,7 @@
 for attr, value in {
     "save_split_attrs": True,
     "date_microseconds": True,
+    "derived_bounds": True,
 }.items():
     with contextlib.suppress(AttributeError):
         setattr(iris.FUTURE, attr, value)
diff --git a/pyproject.toml b/pyproject.toml
index eb4a9a4939..a83c1d3e03 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -65,7 +65,7 @@ dependencies = [
     "requests",
     "rich",
     "scipy>=1.6",
-    "scitools-iris>=3.12.2",  # github.com/SciTools/iris/issues/6417
+    "scitools-iris>=3.13",
     "shapely>=2.0.0",
     "stratify>=0.3",
     "xarray",