Не получается установить libcurl4-openssl-dev. Как?

Depends: librtmp-dev but it is not going to be installed

libgnutls-dev : Depends: libgnutls26 (= 2.12.23-12ubuntu2.8) but 2.12.23-12ubuntu2.9 is to be installed
Depends: libgnutlsxx27 (= 2.12.23-12ubuntu2.8) but it is not going to be installed
Depends: libgnutls-openssl27 (= 2.12.23-12ubuntu2.8) but 2.12.23-12ubuntu2.9 is to be installed