Upgrade qgis in debian jessie (linux)

I want to upgrade qgis 2.6 to qgis 2.8 in linux (debian jessie). I did:

sudo apt-get update
sudo aptitude full-upgrade

And I get this error:

Até aqui tudo bem...

Processing triggers for hicolor-icon-theme (0.13-1) ...
Setting up qgis-providers (1:2.9.0+git20150224+4629205+13jessie) ...
/usr/lib/qgis/crssync: error while loading shared libraries: libqgis_core.so.2.9.0: cannot open shared object file: No such file or directory
dpkg: error processing package qgis-providers (--configure):
 subprocess installed post-installation script returned error exit status 127
Setting up qgis-common (1:2.9.0+git20150224+4629205+13jessie) ...
dpkg: dependency problems prevent configuration of qgis:
 qgis depends on qgis-providers (= 1:2.9.0+git20150224+4629205+13jessie); however:
  Package qgis-providers is not configured yet.

dpkg: error processing package qgis (--configure):
 dependency problems - leaving unconfigured
Setting up osgearth-data (2.5.0+dfsg-2) ...
Setting up qgis-plugin-globe-common (1:2.9.0+git20150224+4629205+13jessie) ...
dpkg: dependency problems prevent configuration of qgis-plugin-globe:
 qgis-plugin-globe depends on qgis (= 1:2.9.0+git20150224+4629205+13jessie); however:
  Package qgis is not configured yet.

dpkg: error processing package qgis-plugin-globe (--configure):
 dependency problems - leaving unconfigured
Setting up qgis-plugin-grass-common (1:2.9.0+git20150224+4629205+13jessie) ...
dpkg: dependency problems prevent configuration of qgis-plugin-grass:
 qgis-plugin-grass depends on qgis (= 1:2.9.0+git20150224+4629205+13jessie); however:
  Package qgis is not configured yet.

dpkg: error processing package qgis-plugin-grass (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 qgis-providers
 qgis
 qgis-plugin-globe
 qgis-plugin-grass
E: Sub-process /usr/bin/dpkg returned an error code (1)

Hope you can help me. Thanks