[QGIS Server] Cannot Install QGIS Mapserver On Ubuntu 12.04

Hello,

I'm trying to install qgis-mapserver on my ubuntu 12.04. I just installed qgis desktop 2.6.0-brighton successfully.
Here is my steps when installed the desktop :

sudo apt-get install python-software-properties
sudo add-apt-repository ppa:ubuntugis/ubuntugis-unstable
sudo apt-get update
sudo apt-get install qgis python-qgis qgis-plugin-grass

But when I tried to install the mapserver :

sudo apt-get install qgis-mapserver libapache2-mod-fcgid

I got this error :

The following packages have unmet dependencies:
qgis-mapserver : Depends: qgis-providers (= 2.4.0-0precise2) but 2.6.0-0precise1 is to be installed

Best Regards,