diff --git a/.github/workflows/build_workflow.yml b/.github/workflows/build_workflow.yml
index 5a437ccf3..89f297206 100644
--- a/.github/workflows/build_workflow.yml
+++ b/.github/workflows/build_workflow.yml
@@ -19,7 +19,8 @@ env:
   # mpich >=5 is built as ch4:ucx,ofi, so UCX is the default netmod.  Azure-hosted
   # GitHub runners expose a MANA RDMA device that UCX tries (and fails) to open,
   # so MPI_Init() aborts inside ESMF_RegridWeightGen.  Restrict UCX to transports
-  # that actually work on the runners.
+  # that actually work on the runners.  rattler-build does not pass this through
+  # to its test environment, so ci/recipe/recipe.yaml sets it separately.
   UCX_TLS: "tcp,self,sm"
 
 jobs:
@@ -55,7 +56,7 @@ jobs:
 
       - if: ${{ steps.skip_check.outputs.should_skip != 'true' }}
         name: Set up Pixi
-        uses: prefix-dev/setup-pixi@v0.10.2
+        uses: prefix-dev/setup-pixi@v0.11.0
         with:
           environments: ${{ matrix.pixi-environment }}
 
@@ -102,7 +103,7 @@ jobs:
       - uses: actions/checkout@v7
 
       - name: Set up Pixi
-        uses: prefix-dev/setup-pixi@v0.10.2
+        uses: prefix-dev/setup-pixi@v0.11.0
         with:
           environments: ${{ matrix.pixi-environment }}
 
diff --git a/.github/workflows/docs_workflow.yml b/.github/workflows/docs_workflow.yml
index 7a468ba56..b260173aa 100644
--- a/.github/workflows/docs_workflow.yml
+++ b/.github/workflows/docs_workflow.yml
@@ -23,7 +23,7 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Pixi
-        uses: prefix-dev/setup-pixi@v0.10.2
+        uses: prefix-dev/setup-pixi@v0.11.0
         with:
           environments: py314
 
diff --git a/ci/recipe/recipe.yaml b/ci/recipe/recipe.yaml
index 380593b76..a9c4136e2 100644
--- a/ci/recipe/recipe.yaml
+++ b/ci/recipe/recipe.yaml
@@ -66,11 +66,18 @@ tests:
         - pytest
         - python ${{ python_min }}.*
     script:
-      - pytest --pyargs mpas_analysis
-      - mpas_analysis --help
-      - mpas_analysis --list
-      - mpas_analysis --plot_colormaps
-      - download_analysis_data --help
+      # rattler-build does not pass the caller's environment through to test
+      # scripts, so the UCX_TLS workaround in build_workflow.yml does not reach
+      # here.  Without it, MPI_Init() in ESMF_RegridWeightGen fails on GitHub
+      # runners that expose a MANA RDMA device.
+      env:
+        UCX_TLS: tcp,self,sm
+      content:
+        - pytest --pyargs mpas_analysis
+        - mpas_analysis --help
+        - mpas_analysis --list
+        - mpas_analysis --plot_colormaps
+        - download_analysis_data --help
 
 about:
   license: BSD-3-Clause