Update build-images.yaml

.github/workflows/build-images.yaml

@@ -27,6 +27,12 @@ jobs:
     name: Generate Build Deps
     runs-on: ubuntu-latest
     steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2
+        with:
+          path: bromite-buildtools
+          fetch-depth: 1
+          
       - name: Building build-deps container ${{ env.VERSION }}
         shell: bash
         run: |