高山包py-pip不见了

我试图安装在我的高山使用Docker撰写文件的Python PIP,但得到以下错误。

ERROR: unsatisfiable constraints: py-pip (missing): required by: world[py-pip] ERROR: Service 'web' failed to build: The command '/bin/sh -c apk add py-pip' returned a non-zero code: 1 

update

 apk add --update py-pip 

要么:

 apk update apk add py-pip