无法在nginx 1.7.9上安装apt-get install nginx-extras软件包

我试图在开发者Ubuntu 网站上按照本指南安装Phusion Passenger for nginx

我已经安装并运行了Nginx,版本是1.7.9-1〜trusty。

我试图按照先决条件: apt-get install nginx-extras并失败,错误消息:

 Unpacking nginx-common (1:1.6.2-2.4.0.56~trusty1) ... dpkg: error processing archive /var/cache/apt/archives/nginx-common_1%3a1.6.2-2.4.0.56~trusty1_all.deb (--unpack): trying to overwrite '/usr/share/nginx/html/index.html', which is also in package nginx 1.7.9-1~trusty Preparing to unpack .../nginx-extras_1%3a1.6.2-2.4.0.56~trusty1_amd64.deb ... Unpacking nginx-extras (1:1.6.2-2.4.0.56~trusty1) ... dpkg: error processing archive /var/cache/apt/archives/nginx-extras_1%3a1.6.2-2.4.0.56~trusty1_amd64.deb (--unpack): trying to overwrite '/usr/sbin/nginx', which is also in package nginx 1.7.9-1~trusty dpkg-deb: error: subprocess paste was killed by signal (Broken pipe) Errors were encountered while processing: /var/cache/apt/archives/nginx-common_1%3a1.6.2-2.4.0.56~trusty1_all.deb /var/cache/apt/archives/nginx-extras_1%3a1.6.2-2.4.0.56~trusty1_amd64.deb E: Sub-process /usr/bin/dpkg returned an error code (1) 

我相信我的nginx版本是直接从nginx.org回购的主线版本。 但是似乎并没有nginx-common或nginx-extras等的匹配版本。有没有人知道是否有1.7.9的额外安装包? 它甚至还需要吗? 或者我需要卸载1.7.9并安装1.6.2的一切?

apt-cache policy nginx-extras

  nginx-extras: Installed: (none) Candidate: 1:1.6.2-2.4.0.56~trusty1 Version table: 1:1.6.2-2.4.0.56~trusty1 0 500 https://oss-binaries.phusionpassenger.com/apt/passenger/ trusty/main amd64 Packages 1.6.2-5+trusty0 0 500 http://ppa.launchpad.net/nginx/stable/ubuntu/ trusty/main amd64 Packages 1.4.6-1ubuntu3.1 0 500 http://archive.ubuntu.com/ubuntu/ trusty-updates/universe amd64 Packages 500 http://security.ubuntu.com/ubuntu/ trusty-security/universe amd64 Packages 1.4.6-1ubuntu3 0 500 http://archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages