The following packages have unmet dependencies:
 nginx : Depends: nginx-core (>= 1.4.6-1ubuntu3.1) but it is not going to be installed or
                  nginx-full (>= 1.4.6-1ubuntu3.1) but it is not going to be installed or
                  nginx-light (>= 1.4.6-1ubuntu3.1) but it is not going to be installed or
                  nginx-extras (>= 1.4.6-1ubuntu3.1) but it is not going to be installed or
                  nginx-naxsi (>= 1.4.6-1ubuntu3.1) but it is not going to be installed
         Depends: nginx-core (< 1.4.6-1ubuntu3.1.1~) but it is not going to be installed or
                  nginx-full (< 1.4.6-1ubuntu3.1.1~) but it is not going to be installed or
                  nginx-light (< 1.4.6-1ubuntu3.1.1~) but it is not going to be installed or
                  nginx-extras (< 1.4.6-1ubuntu3.1.1~) but it is not going to be installed or
                  nginx-naxsi (< 1.4.6-1ubuntu3.1.1~) but it is not going to be installed