https://launchpad.net/ubuntu/+source/gtk+3.0/3.6.4-0ubuntu2/+build/4247991 looks like the build failed...
E: Unable to locate package libxkbcommon-dev apt-get failed.
https:/ /launchpad. net/ubuntu/ +source/ gtk+3.0/ 3.6.4-0ubuntu2/ +build/ 4247991 looks like the build failed...
E: Unable to locate package libxkbcommon-dev
apt-get failed.