我正在遵循这个指南：https://medium.com/power-user/ubuntu-mate-on-a-chromebook-with-crouton-2cebd167382#.bjbns1p7v
我已经到了尝试检索和安装 ubuntu mate 的部分。
sudo apt-get install ubuntu-mate-core ubuntu-mate-desktop
但是我收到以下错误消息：
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:
ubuntu-mate-core : Depends: mate-desktop-environment-core but it is not going to be installed
Depends: ubuntu-mate-default-settings but it is not going to be installed
ubuntu-mate-desktop : Depends: mate-menu but it is not going to be installed
Depends: mozo but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
我有tried sudo apt-get install一些依赖项，但它们只产生类似的结果。进一步Depends: <something else> but it is not going to be installed或but it is not installable
我对 Linux 还不太熟悉，因此如果能得到任何帮助我都会很感激。
感谢您的时间。