docs: def build(self):
          """Run the build command specified in index.yaml."""
          for cmd in self.build_cmds:
              log.info('building command: {}'.format(cmd))
              full_cmd = 'cd {}; {}'.format(self.analyses_path, cmd)
              log.debug('full command: {}'.format(full_cmd))
              subprocess.call(full_cmd, shell=True)
              log.info('build done')