diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 364fb9b..4d14166 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -167,8 +167,9 @@ jobs:
 
     - name: Run tests
       run: |
-        ls
         ./dev-scripts/prepare_release.sh --name aws-crt --user aws-crt --email aws-sdk-common-runtime@amazon.com --version 1.0.0 --notes NOTES
-        ls *.tgz
-        tar zxvf *.tgz
-        ls
\ No newline at end of file
+        tar -zxf *.tgz
+        cd awscrt-1.0.0
+        python3 -c "from urllib.request import urlretrieve; urlretrieve('${{ env.BUILDER_HOST }}/${{ env.BUILDER_SOURCE }}/${{ env.BUILDER_VERSION }}/builder.pyz?run=${{ env.RUN }}', 'builder')"
+        chmod a+x builder
+        ./builder build -p ${{ env.PACKAGE_NAME }} --spec=downstream