diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index b49130056..f5edbc6d8 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -47,7 +47,7 @@ jobs:
       group: ${{ github.workflow }}-${{ github.job }}-${{matrix.name}}-${{ github.head_ref || github.run_id }}
       cancel-in-progress: true
     runs-on:
-      group: aws-highmemory-32-plus-priv
+      group: ${{ matrix.platform == 'linux/arm64' && 'aws-r8g-8xl-plus-nix' || 'aws-highmemory-32-plus-priv' }}
     permissions:
       contents: write
       packages: write
@@ -126,7 +126,7 @@ jobs:
           context: .
           file: ${{ matrix.dockerfile }}
           push: ${{ github.event_name != 'pull_request' }}
-          platforms: ${{ matrix.platforms || 'linux/amd64' }}
+          platforms: ${{ matrix.platform || 'linux/amd64' }}
           build-args: |
             SCCACHE_GHA_ENABLED=${{ matrix.sccache }}
             CUDA_COMPUTE_CAP=${{ matrix.cudaComputeCap }}
@@ -168,7 +168,7 @@ jobs:
           target: grpc
           file: ${{ matrix.dockerfile }}
           push: ${{ github.event_name != 'pull_request' }}
-          platforms: ${{ matrix.platforms || 'linux/amd64' }}
+          platforms: ${{ matrix.platform || 'linux/amd64' }}
           build-args: |
             SCCACHE_GHA_ENABLED=${{ matrix.sccache }}
             CUDA_COMPUTE_CAP=${{ matrix.cudaComputeCap }}
diff --git a/.github/workflows/matrix.json b/.github/workflows/matrix.json
index 69c911dd4..0f1b400c9 100644
--- a/.github/workflows/matrix.json
+++ b/.github/workflows/matrix.json
@@ -69,7 +69,7 @@
     "runOn": "always",
     "sccache": true,
     "cudaComputeCap": 121,
-    "platforms": "linux/arm64",
+    "platform": "linux/arm64",
     "grpc": true,
     "dockerfile": "Dockerfile-cuda"
   },
@@ -94,7 +94,7 @@
     "imageNamePrefix": "cpu-arm64-",
     "runOn": "always",
     "sccache": true,
-    "platforms": "linux/arm64",
+    "platform": "linux/arm64",
     "grpc": true,
     "dockerfile": "Dockerfile-arm64"
   },