diff --git a/.github/workflows/extract-rootfs.yml b/.github/workflows/extract-rootfs.yml
index 3d611f6..9c6dab6 100644
--- a/.github/workflows/extract-rootfs.yml
+++ b/.github/workflows/extract-rootfs.yml
@@ -14,7 +14,7 @@ jobs:
   build:
     strategy:
       matrix:
-        os: [ubuntu-latest]
+        os: [blacksmith-4vcpu-ubuntu-2404]
     runs-on: ${{ matrix.os }}
     steps:
       - name: Check out
@@ -23,8 +23,8 @@ jobs:
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
 
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+      - name: Setup Blacksmith Builder
+        uses: useblacksmith/setup-docker-builder@v1
 
       - name: Build Docker Image
         run: |
@@ -53,7 +53,7 @@ jobs:
     name: Release
     needs: build
     if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     steps:
       - name: Download RootFS
         id: download-rootfs