我照着 passenger 的官方教程： https://www.phusionpassenger.com/library/install/nginx/install/oss/trusty/ 然后执行到 sudo apt-get install -y nginx-extras passenger 命令时出现：

myuser@ubuntu:~$ sudo apt-get install -y nginx-extras passenger Reading package lists... Done Building dependency tree
Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation:

The following packages have unmet dependencies: nginx-extras : Depends: nginx-common (= 1:1.12.2-8.5.1.12~trusty1) but 1:1.14.0-8.5.3.1~trusty1 is to be installed Recommends: passenger (< 5.1.13) but 1:5.1.12-1~trusty1 is to be installed E: Unable to correct problems, you have held broken packages. myuser@ubuntu:~$

请问，该怎么办？Google 和百度了很久，重装了很多次都不行。