新浪SAE git push sae master出错

$ git push sae master
Username for 'https://git.sinacloud.com': 947363237@qq.com
Counting objects: 19, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (12/12), done.
Writing objects: 100% (19/19), 2.74 KiB | 0 bytes/s, done.
Total 19 (delta 1), reused 0 (delta 0)
remote: Exporting git code...
remote: Uploading...
-----> Unable to select a buildpack
remote: {"Code":1,"Error":"build image failed: exit status 1."}
remote: 错误：构建镜像失败
remote: error: hook declined to update refs/heads/master
To https://git.sinacloud.com/liswx1
! [remote rejected] master -> master (hook declined)
error: failed to push some refs to 'https://git.sinacloud.com/liswx1'

http://blog.csdn.net/oldinaction/article/details/49708237

遇到同样问题，请问您是如何解决的呢？