diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f882b5b21..f23cf2dc0 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -27,11 +27,10 @@ jobs:
           echo "timestamp=$timestamp" >> $GITHUB_OUTPUT
 
   base:
-    # `unbuntu-22.04-8core` for arch amd64 non-scheduled builds
-    # `unbuntu-22.04` for arch amd64 scheduled builds
+    # `debian-12` for amd64 builds
     # `unbuntu-22.04-8core-arm` for arch arm64 non-scheduled builds
     # `unbuntu-22.04-2core-arm` for arch arm64 scheduled builds
-    runs-on: ubuntu-22.04${{ ((github.event_name != 'schedule') && '-8core') || (( matrix.arch == 'arm64' && '-2core' ) || '') }}${{ (matrix.arch == 'arm64') && '-arm' || '' }}
+    runs-on: ${{ (matrix.arch == 'amd64' && 'debian-12') || (github.event_name == 'schedule' && 'ubuntu-22.04-2core-arm') || 'ubuntu-22.04-8core-arm' }}
     strategy:
       matrix:
         arch: [amd64, arm64]
@@ -49,6 +48,10 @@ jobs:
         with:
           fetch-depth: 1
 
+      - name: Install Ruby
+        run: |
+          apt-get update && apt-get install -y ruby
+
       - name: build deps image
         working-directory: image
         run: |