Mesa and nvidia conflict

I am quite new to Linux. I have spent hours searching through forums for the answer. I'm using Arch Linux and am unable to update the system now as I keep getting an error telling me that Mesa-libgl and nvidia-libgl are in conflict. I attempted to fix this with sudo pacman -S nvidia nvidia-libgl. When I rebooted I just got a black screen that had some info and it would just hang there and never load GNOME. I just want to re-install mesa and mesa-libgl. I chroot in from GRUB and it puts me as root@(none). pacman -S mesa mesa-libgl just gives me could not resolve host on all my mirrors.