Sounds like you have the mirror is behind, from before Utopic was released. What does "apt-cache policy awscli" say?
I get: $ rmadison awscli awscli | 1.2.9-2 | trusty/universe | source, all awscli | 1.3.21-1 | utopic/universe | source, all awscli | 1.7.0-1 | vivid/universe | source, all $ chdist apt-cache utopic policy awscli awscli: Installed: (none) Candidate: 1.3.21-1 Version table: 1.3.21-1 0 500 http://archive.ubuntu.com/ubuntu/ utopic/universe amd64 Packages (I'm using chdist since I'm not running a Utopic system) -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to awscli in Ubuntu. https://bugs.launchpad.net/bugs/1326039 Title: awscli stack traces when run To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/awscli/+bug/1326039/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs