diff --git a/crates/cuddle-ci/src/rust_service/ssh_agent.rs b/crates/cuddle-ci/src/rust_service/ssh_agent.rs
index e20c7ad..bf2daf6 100644
--- a/crates/cuddle-ci/src/rust_service/ssh_agent.rs
+++ b/crates/cuddle-ci/src/rust_service/ssh_agent.rs
@@ -31,13 +31,15 @@ impl DaggerMiddleware for SshAgent {
         let c = container
             .with_new_file_opts(
                 format!("{home}/.ssh/config"),
-                ContainerWithNewFileOptsBuilder::default().contents(
-                    r#"
+                ContainerWithNewFileOptsBuilder::default()
+                    .contents(
+                        r#"
 Host *
    StrictHostKeyChecking no
    UserKnownHostsFile=/dev/null
                 "#,
-                ),
+                    )
+                    .build()?,
             )
             .with_unix_socket(&sock_var, socket)
             .with_env_variable("SSH_AUTH_SOCK", &sock_var);