I think your system is outdated, and nvidia304-libs already provides libGL.

Am Freitag, 8. Juli 2016 12:54:47 UTC+2 schrieb Dominykas Mostauskis:
>
> When I try to install opengl with `xbps-install libgl` I get `xbps-install 
> libGL: nvidia304 broken, unresolved shlib 'libnvidia-mk.so.1'`. I'm not 
> sure I understand the meaning of this error, or how to resolve it. Can you 
> offer advice?
>
> My card is Geforce 7900gs, I'm on a 64-bit processor, have nvidia304 
> installed, glibc system.
>