diff --git a/circle.yml b/circle.yml
index 87b8bff..4a18274 100644
--- a/circle.yml
+++ b/circle.yml
@@ -40,6 +40,7 @@ commands:
       - run:
           name: "Package"
           command: |
+            cmake --build ~/build --target package_source
             cmake --build ~/build --target package
             mkdir ~/package
             mv ~/build/evmc-*.tar.gz ~/package