diff --git a/src/compiler/rust.rs b/src/compiler/rust.rs
index 05206f01a4..4e5742505a 100644
--- a/src/compiler/rust.rs
+++ b/src/compiler/rust.rs
@@ -2372,7 +2372,7 @@ impl RlibDepReader {
         trace!("Discovering dependencies of {}", rlib.display());
 
         let mut cmd = process::Command::new(&self.executable);
-        cmd.args(["-Z", "ls"])
+        cmd.args(["-Z", "ls=root"])
             .arg(rlib)
             .env_clear()
             .envs(env_vars.to_vec())