当我尝试“ apt-get dist-upgrade”时，我总是收到以下错误：
The following packages have unmet dependencies:
linux-virtual : Depends: linux-image-virtual (= 3.2.0.87.101) but 3.2.0.94.108 is installed
Depends: linux-headers-virtual (= 3.2.0.87.101) but 3.2.0.94.108 is installed
E: Unmet dependencies. Try using -f.
当我尝试“ apt-get -f install”时，我收到：
dpkg: dependency problems prevent configuration of linux-virtual:
linux-virtual depends on linux-image-virtual (= 3.2.0.87.101); however:
Version of linux-image-virtual on system is 3.2.0.94.108.
linux-virtual depends on linux-headers-virtual (= 3.2.0.87.101); however:
Version of linux-headers-virtual on system is 3.2.0.94.108.
dpkg: error processing linux-virtual (--configure):
dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
Errors were encountered while processing:
linux-virtual
E: Sub-process /usr/bin/dpkg returned an error code (1)
请帮助，