In this setup, there is an error when the command make prepare-docker in the second part. The following command doesn’t work either, probably due to this.
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help resolve the situation:
The following packages have unmet dependencies:
nvidia-docker2 : Depends: docker-ce (= 18.06.1~ce~3-0~ubuntu) but it is not installable or
docker-ee (= 18.06.1~ee~3-0~ubuntu) but it is not installable
E: Unable to correct problems, you have held broken packages.
docker: Error response from daemon: Unknown runtime specified nvidia.
See 'docker run --help'.
Makefile:12: recipe for target 'prepare-docker' failed
make: *** [prepare-docker] Error 125