Problems with desktop apps installed with Nix on Debian

I've installed nix on debian, but I'm struggling with certain applications.

I've tried a few apps for playing music from spotify, but it seems it fails to initialize the sound system. I'm getting some error messages related to ALSA.

I also notice that electron apps fail to start. This time with reference to Mesa.

Is there a configuration option or some program I need to install in order to fix these issues?