diff --git a/crates/sel4-newlib/build.rs b/crates/sel4-newlib/build.rs
index 945725f5c..aaee0d30c 100644
--- a/crates/sel4-newlib/build.rs
+++ b/crates/sel4-newlib/build.rs
@@ -30,5 +30,7 @@ fn detect_libc() {
         .parent()
         .unwrap();
 
+    assert!(lib_path.has_root());
+
     println!("cargo:rustc-link-search=native={}", lib_path.display());
 }