有时，当我安装东西时，我会收到如下错误：
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:
package1 : Depends: package2 (>= 1.8) but 1.7.5-1ubuntu1 is to be installed
E: Unable to correct problems, you have held broken packages.
我该如何解决这个问题？
package-management apt ppa dependencies software-installation
我最近没有安装任何新软件包或添加任何 PPA，只是运行了 apt 更新。
运行“apt升级”后
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
libglvnd-dev : Depends: libglvnd0 (= 1.0.0-2ubuntu2.1) but 1.0.0-2ubuntu2.2 is installed
Depends: libglvnd-core-dev (= 1.0.0-2ubuntu2.1) but 1.0.0-2ubuntu2.2 is installed
Depends: libegl1 (= 1.0.0-2ubuntu2.1) but 1.0.0-2ubuntu2.2 is installed
Depends: libgles2 (= 1.0.0-2ubuntu2.1) but 1.0.0-2ubuntu2.2 is installed
Depends: libgl1 (= 1.0.0-2ubuntu2.1) but 1.0.0-2ubuntu2.2 is installed
Depends: libglx0 (= 1.0.0-2ubuntu2.1) but …