diff --git a/Cargo.toml b/Cargo.toml
index ac91a20..eae8b49 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,8 +7,6 @@ members = [
     "tests",
 ]
 
-exclude = ["target/*"]
-
 [workspace.package]
 edition = "2021"
 version = "0.2.0"
diff --git a/binder_ndk_sys/build.rs b/binder_ndk_sys/build.rs
index 321818b..cdeea0f 100644
--- a/binder_ndk_sys/build.rs
+++ b/binder_ndk_sys/build.rs
@@ -17,6 +17,8 @@ rust-version = "1.67"
 
 [lib]
 crate-type = ["cdylib"]
+
+[workspace]
 "#;
 
 fn build_stub() -> Result<()> {
@@ -42,7 +44,7 @@ fn build_stub() -> Result<()> {
     f.flush()?;
 
     let target = env::var("TARGET")?;
-    Command::new("cargo")
+    let s = Command::new("cargo")
         .arg("build")
         .arg("--target")
         .arg(&target)
@@ -53,10 +55,12 @@ fn build_stub() -> Result<()> {
         .current_dir(&project_path)
         .status()?;
 
+    assert!(s.success(), "{s:?}");
+
     // we always use debug build for stub due to speed!
     println!(
         "cargo:rustc-link-search={}",
-        format!("{}/{}/{}", outdir, target, "debug")
+        format_args!("{}/{}/{}", outdir, target, "debug")
     );
     println!("cargo:rustc-link-lib=binder_ndk");