[libvirt] No VirtualBox Driver

Hi all, I am new to the group and hence there might be a chance I might be asking a simple question... The thing is I compiled and installed libvirt from git. Then in my terminal window I started virsh. It started. Then since I had Virtual Box installed on my machine I ran "connect vbox:///session". Once I did this I got two errors which said: error: Failed to connect to the hypervisor error: internal error unable to initialize VirtualBox driver API I am unable to resolve this issue...Any input is welcome! Thanks! -- Regards, Arslan Waqar.