steam error

Any suggestions for how to debug the following steam error? It happens on a AMD64 architecture system running Debian/Jessie with NVidia graphics hardware. $ steam Running Steam on debian 8 64-bit STEAM_RUNTIME is enabled automatically Installing breakpad exception handler for appid(steam)/version(1424305157) libGL error: unable to load driver: nouveau_dri.so libGL error: driver pointer missing libGL error: failed to load driver: nouveau libGL error: unable to load driver: swrast_dri.so libGL error: failed to load driver: swrast -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/