diff --git a/crates/dagger-rust/src/build.rs b/crates/dagger-rust/src/build.rs
index 6ed80b3..d9de096 100644
--- a/crates/dagger-rust/src/build.rs
+++ b/crates/dagger-rust/src/build.rs
@@ -112,6 +112,8 @@ impl RustBuild {
                         )
                         .await?;
 
+                    build_container.export("output.tar").await?;
+
                     let bin = build_container
                         .with_exec(vec![
                             "cargo",