diff --git benchmark.py benchmark.py
index a191ee0..d99c8a8 100755
--- xxbenchmark.py
+++ xxbenchmark.py
@@ -76,7 +76,9 @@ def gather_binaries():
     # Build the current version
     print()
     print("Building current sources...")
-    subprocess.run(["cargo", "build", "--release"], check=True)
+    buildenv = os.environ.copy()
+    buildenv["RUSTFLAGS"] = "-Awarnings"
+    subprocess.run(["cargo", "build", "--release"], check=True, env=buildenv)
     shutil.copy("target/release/riff", os.path.join(BINDIR, "riff-current"))