diff --git a/collector/src/bin/rustc-fake.rs b/collector/src/bin/rustc-fake.rs
index aa15a78ed..273f12847 100644
--- a/collector/src/bin/rustc-fake.rs
+++ b/collector/src/bin/rustc-fake.rs
@@ -80,7 +80,7 @@ fn main() {
         .ok()
         .and_then(|v| v.parse::<u32>().ok())
     {
-        args.push(OsString::from(format!("-Zthreads={count}")));
+        args.push(OsString::from(format!("--jobs-frontend={count}")));
     }
 
     args.push(OsString::from("-Adeprecated"));
diff --git a/collector/src/compile/execute/mod.rs b/collector/src/compile/execute/mod.rs
index 078fc9618..a424631b6 100644
--- a/collector/src/compile/execute/mod.rs
+++ b/collector/src/compile/execute/mod.rs
@@ -423,8 +423,11 @@ impl<'a> CargoProcess<'a> {
             cmd.arg("-p").arg(self.get_pkgid(self.cwd)?);
 
             assert!(
-                !self.rustc_args.iter().any(|arg| arg.contains("-Zthreads")),
-                "rustc_args should not contain -Zthreads, set frontend_threads in perf-config.json instead"
+                !self
+                    .rustc_args
+                    .iter()
+                    .any(|arg| arg.contains("--jobs-frontend")),
+                "rustc_args should not contain --jobs-frontend, set frontend_threads in perf-config.json instead"
             );
             cmd.env(
                 "RUSTC_THREAD_COUNT",