From 4709532c7616b72e56c4bc8ca8c56722d17d65cc Mon Sep 17 00:00:00 2001
From: Wei Ji <23487320+weiji14@users.noreply.github.com>
Date: Mon, 15 Jun 2026 11:05:59 +1200
Subject: [PATCH 1/4] Add nodask constraint for test-py313-no-dask environment

Explicitly exclude dask-core from being installed.
---
 pixi.toml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pixi.toml b/pixi.toml
index 3e429f6f6eb..49ca81d34f5 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -376,6 +376,9 @@ numpydoc = "*"
 [feature.numpydoc-lint.tasks]
 numpydoc-lint = { cmd = "python ci/numpydoc-public-api.py" }
 
+[feature.nodask.constraints]
+dask-core = "<0.0a0"
+
 [environments]
 # Testing
 # test-just-xarray = { features = ["test"] } # https://github.com/pydata/xarray/pull/10888/files#r2511336147
@@ -390,6 +393,7 @@ test-py313-no-numba = { features = [
 ] }
 test-py313-no-dask = { features = [
   "py312",
+  "nodask",
   "test",
   "backends",
   "accel",

From 183128aad96e7e8b62d03924672ff5f54473c670 Mon Sep 17 00:00:00 2001
From: Wei Ji <23487320+weiji14@users.noreply.github.com>
Date: Mon, 15 Jun 2026 11:11:46 +1200
Subject: [PATCH 2/4] Remove iris from feature.extras.dependencies because it
 depends on dask

---
 pixi.toml | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/pixi.toml b/pixi.toml
index 49ca81d34f5..ea38d95b1ca 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -93,9 +93,6 @@ pooch = "*"
 # calendar
 cftime = "*"
 
-# other
-iris = "*"
-
 [feature.extras.pypi-dependencies]
 # array
 jax = "*" # no way to get cpu-only jaxlib from conda if gpu is present

From b1b63b50777c7cbb9c984c0f2cbdc02d60a59d57 Mon Sep 17 00:00:00 2001
From: Wei Ji <23487320+weiji14@users.noreply.github.com>
Date: Fri, 19 Jun 2026 08:17:21 +1200
Subject: [PATCH 3/4] Revert "Remove iris from feature.extras.dependencies
 because it depends on dask"

This reverts commit 183128aad96e7e8b62d03924672ff5f54473c670.
---
 pixi.toml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pixi.toml b/pixi.toml
index 3a26536e7c3..c567688dea5 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -93,6 +93,9 @@ pooch = "*"
 # calendar
 cftime = "*"
 
+# other
+iris = "*"
+
 [feature.extras.pypi-dependencies]
 # array
 jax = "*" # no way to get cpu-only jaxlib from conda if gpu is present

From 4568effe8530994bf7ea3f89bff7eefde049d505 Mon Sep 17 00:00:00 2001
From: Wei Ji <23487320+weiji14@users.noreply.github.com>
Date: Fri, 19 Jun 2026 09:04:54 +1200
Subject: [PATCH 4/4] Add iris under feature.dask.dependencies

---
 pixi.toml | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/pixi.toml b/pixi.toml
index c567688dea5..69bf425dcfc 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -63,6 +63,7 @@ numbagg = "*"
 [feature.dask.dependencies]
 dask = "*"
 distributed = "*"
+iris = "*"        # depends on dask
 
 [feature.accel.dependencies]
 flox = "*"
@@ -93,9 +94,6 @@ pooch = "*"
 # calendar
 cftime = "*"
 
-# other
-iris = "*"
-
 [feature.extras.pypi-dependencies]
 # array
 jax = "*" # no way to get cpu-only jaxlib from conda if gpu is present