-deb http://archive.ubuntu.com/ubuntu/ xenial main
-deb http://archive.ubuntu.com/ubuntu/ xenial-updates main
-deb http://archive.ubuntu.com/ubuntu/ xenial-security main
+deb http://archive.ubuntu.com/ubuntu/ xenial main universe
+deb http://archive.ubuntu.com/ubuntu/ xenial-updates main universe
+deb http://archive.ubuntu.com/ubuntu/ xenial-security main universe
-deb http://archive.ubuntu.com/ubuntu/ yakkety main
-deb http://archive.ubuntu.com/ubuntu/ yakkety-updates main
-deb http://archive.ubuntu.com/ubuntu/ yakkety-security main
+deb http://archive.ubuntu.com/ubuntu/ yakkety main universe
+deb http://archive.ubuntu.com/ubuntu/ yakkety-updates main universe
+deb http://archive.ubuntu.com/ubuntu/ yakkety-security main universe