Rudder websites

I'm installing a VM with rudder-vagrant and the console stay in wait with this "warning"

Reading task descriptions...
The following NEW packages will be installed:
  apache2{a} apache2-mpm-worker{a} apache2-utils{a} apache2.2-bin{a}
  apache2.2-common{a} avahi-daemon{a} dbus{a} git{a} git-core{a} gsfonts{a}
  gsfonts-x11{a} java-common{a} libapr1{a} libaprutil1{a}
  libaprutil1-dbd-sqlite3{a} libaprutil1-ldap{a} libasound2{a}
  libavahi-common-data{a} libavahi-common3{a} libavahi-core7{a}
  libcurl3-gnutls{a} libdaemon0{a} libdb4.6{a} libdbus-1-3{a}
  liberror-perl{a} libfontenc1{a} libltdl7{a} libnss-mdns{a} libpcre3{a}
  libpq5{a} libxfont1{a} libxi6{a} libxtst6{a} odbcinst{a}
  odbcinst1debian2{a} postgresql{a} postgresql-8.4{a}
  postgresql-client-8.4{a} postgresql-client-common{a} postgresql-common{a}
  rsync{a} rudder-cfengine-community{a} rudder-inventory-endpoint{a}
  rudder-inventory-ldap{a} rudder-jetty{a} rudder-reports{a}
  rudder-server-root rudder-techniques{a} rudder-webapp{a} ssl-cert{a}
  sun-java6-bin{a} sun-java6-jre{a} unixodbc{a} x11-common{a}
  xfonts-encodings{a} xfonts-utils{a}
0 packages upgraded, 56 newly installed, 0 to remove and 77 not upgraded.
Need to get 165 MB of archives. After unpacking 315 MB will be used.
WARNING: untrusted versions of the following packages will be installed!

Untrusted packages could compromise your system's security.
You should only proceed with the installation if you are certain that
this is what you want to do.

  rudder-reports rudder-techniques rudder-inventory-endpoint
  rudder-server-root rudder-jetty rudder-webapp rudder-inventory-ldap
  rudder-cfengine-community

Do you want to ignore this warning and proceed anyway?
To continue, enter "Yes"; to abort, enter "No":
Unrecognized input.  Enter either "Yes" or "No".
Do you want to ignore this warning and proceed anyway?
To continue, enter "Yes"; to abort, enter "No":