If you ever happen to develope for Harmattan (probably very unlikely), and get the "Cannot deploy: You want to deploy to Qemu, but it is not enabled" error, the solution is simple.
From qtcreator -> tools -> options ->Linux devices page. Your saviour is the "Configuration" list.
Add an entry for your n9 / n950 (in case you have it not already), and put it as default. Tada.
From qtcreator -> tools -> options ->Linux devices page. Your saviour is the "Configuration" list.
Add an entry for your n9 / n950 (in case you have it not already), and put it as default. Tada.