diff --git a/.github/workflows/build-conda-images.yml b/.github/workflows/build-conda-images.yml
index 4f4f9f43d..9e5290cef 100644
--- a/.github/workflows/build-conda-images.yml
+++ b/.github/workflows/build-conda-images.yml
@@ -28,7 +28,7 @@ env:
 
 jobs:
   build-docker:
-    runs-on: ubuntu-22.04
+    runs-on: linux.12xlarge.ephemeral
     strategy:
       matrix:
         cuda_version: ["11.8", "12.1", "cpu"]