Comment # 8 on bug 4441 from Sean Callaway

I've added `ExclusiveArch: x86_64` to the .spec file.

(In reply to Nicolas Chauvet from comment #7)
> btw, you shoudn't expect Discord to rely on any system ffmpeg. I expect it
> has ffmpeg builtin.

I haven't place any such requirements in the spec file, but am not positive
that it's bundled in, as all of my systems have ffmpeg installed on them to
satisfy other dependencies.