> + cargocmd = ['cargo', 'build', '-vv', '--release'] > + try: > + subprocess.check_call(cargocmd, env=env, cwd=self.rustsrcdir) > + except OSError as exc: > + if exc.errno == os.errno.ENOENT: Added `import errno` to not abuse `os.errno`. I don't think it's a re-exported module.