Limit sleep time to 1s minimum

        for pkgname in self._config.sections():

          pkg = Package(pkgname, self._config[pkgname])

          next_checks.add(pkg.check())

        # Sleep until next check.

        timeout = min(next_checks)

        debug(f"Waiting for {timeout}s")

        # Time to sleep until next check, with a minimum of 1s.

        min_next_checks = min(next_checks)

        timeout = max(1, min_next_checks)

        debug(f"Next check is planned in {min_next_checks}s, waiting for {timeout}s")

        sleep(timeout)

      except InterruptedError:

        pass