diff --git a/setup.py b/setup.py
index 718f9ce7a..26282fcbc 100755
--- a/setup.py
+++ b/setup.py
@@ -1482,6 +1482,7 @@ def clean() -> None:
                 os.unlink(os.path.join(root, f))
     for x in glob.glob('glfw/wayland-*-protocol.[ch]'):
         os.unlink(x)
+    subprocess.check_call(['go', 'clean', '-cache', '-testcache', '-modcache', '-fuzzcache'])
 
 
 def option_parser() -> argparse.ArgumentParser:  # {{{