dpkg-buildpackage提示No secret key

[liaokejie]

当我按照Build的指示，运行“dpkg-buildpackage”时，报错
gpg: skipped "Signing Key (Thomas Li) package@promansible.io": No secret key
gpg: dpkg-sign.nA03E6XQ/promansible-monitor_1.1.dsc: clear-sign failed: No secret key

请问如何处理？？为(Thomas Li) package@promansible.io建立秘钥？