diff --git a/.github/workflows/push_conda.yml b/.github/workflows/push_conda.yml
index 36dde45..c6b7473 100644
--- a/.github/workflows/push_conda.yml
+++ b/.github/workflows/push_conda.yml
@@ -25,6 +25,10 @@ on:
 
 jobs:
   publish:
+    # fused-ops-v* releases are published by push_conda_fused_ops.yml
+    if: >-
+      github.event_name != 'release'
+      || !startsWith(github.event.release.tag_name, 'fused-ops-v')
     runs-on: ubuntu-latest
 
     steps:
diff --git a/.github/workflows/push_conda_fused_ops.yml b/.github/workflows/push_conda_fused_ops.yml
index cf9c758..f4c9fda 100644
--- a/.github/workflows/push_conda_fused_ops.yml
+++ b/.github/workflows/push_conda_fused_ops.yml
@@ -56,7 +56,13 @@ jobs:
 
       - name: Build
         uses: prefix-dev/rattler-build-action@v0.2.34
+        env:
+          # hosted runners have no GPU, so declare the __cuda virtual package for
+          # the CUDA pytorch in the host and test environments
+          CONDA_OVERRIDE_CUDA: "12.6"
         with:
+          # the action's default rattler-build is too old for --variant
+          rattler-build-version: v0.77.0
           recipe-path: fused_ops/recipe/recipe.yaml
           upload-artifact: false
           build-args: >-