I had the exact same problem with nvidia drivers and I could not solve it, so I switched to Manjaro. I hope someone will find a solution so i can come back to Netrunner.
p.s. I know that is off topic but where can i find Netrunners desktop theme?
Per other post the problem is a conflict and thus you can not install the Nvidia drivers. It is being worked on to see why this is happening and until this is fixed you won’t be able to install it. This only happened with the 2014.09 as it was working fine with 2014.04.
Netrunner Rolling is based on Manjaro and not arch, you can not use the arch method to install video drivers, the graphics stack is different. You will need to use MHWD either through the GUI in Manjaro Settings Manager or from the command line.
No problems. that would be the easiest way to solve your issue, especially if your not comfortable changing the drivers manually yourself. Just remember to boot the live environment using the non-free drivers option if you wish to have the proprietary drivers installed by default.