Seems that SteamLink isn't looking in the right place for the vdpau drivers?

Failed to open VDPAU backend libvdpau_radeonsi.so: cannot open shared object file: No such file or directory
INFO: ffmpeg error: VDPAU device creation on X11 display :99.0 failed.
INFO: CVDPAUAccel: av_hwdevice_ctx_create() failed
INFO: CVAAPIAccel: Couldn't load libva.so.1

[user@desktop ~]$ ls -l /usr/lib64/vdpau/libvdpau_radeonsi.so
lrwxrwxrwx 1 root root 26 Mar 12 08:56 /usr/lib64/vdpau/libvdpau_radeonsi.so -> libvdpau_radeonsi.so.1.0.0
[user@desktop ~]$ ls -l /usr/lib/vdpau/libvdpau_radeonsi.so
lrwxrwxrwx 1 root root 26 Mar 12 08:58 /usr/lib/vdpau/libvdpau_radeonsi.so -> libvdpau_radeonsi.so.1.0.0

files all look good to me, no permissions issues or anything, but a base level OS issue trying to get the actual drivers... is there some environmental variable I need to be setting??