Error: NVIDIA Platform not found

Hello,

I compiled ngm myself, apparently without errors. It works well with the CPU computation.
However, when I use the -g option I get:

[OPENCL] Available platforms: 1
[OPENCL] AMD Accelerated Parallel Processing
[OPENCL] NVIDIA Platform not found. Falling back to AMD.
[OPENCL] Available platforms: 1
[OPENCL] AMD Accelerated Parallel Processing
[OPENCL] Selecting OpenCl platform: AMD Accelerated Parallel Processing
[OPENCL] Platform: OpenCL 1.2 AMD-APP (1214.3)
[OPENCL] Couldn't get number of OpenCl devices. Error: 
Error: Device not found. (-1)
terminate called without an active exception

I am using Manjaro linux on a Lenovo thinkpad P70. The GPU is the Quadro M600M, driver installed as per the Manjaro documentation
sudo mhwd -a pci nonfree 0300

Thank you