DIGITS installation guidance

currently i am trying to install DIGITS using a web based installer on my system running on Ubuntu Mate 15.04. But during installation I am getting the following error after sometime:
ImportError: PyCapsule_Import could not import module “datetime”
Can someone please help me with it ??

I downloaded the latest DIGITS I believe its 5.3. I have built caffe with the CPU only option. The problem I’m having is that when I go to train with a dataset caffe is spawned with the --gpus=0 flag saying to use the GPU at id 0 which is the first GPU.

I run ./digits-devserver and there is no --config or -c option in this version. How can I tell digits to not use the GPU so it won’t put the --gpus=0 flag on the execution line for caffe?