Issue description

For visibility of our project it would be good if Steam can detect NixOS.

Then it might appear in their stats: https://store.steampowered.com/hwsurvey/Steam-Hardware-Software-Survey-Welcome-to-Steam?platform=linux

Error on console:

sh: lsb_release: command not found

Related to #22729

Currently detected system informations:

Betriebssystem:
    Linux 4.x (64 Bit)
    Kernel-Name: Linux
    Kernel-Version: 4.19.47
    X-Server-Vendor: The X.Org Foundation
    X-Server-Release: 12004000
    X-Fenstermanager: Mutter(Gala)
    Steam-Runtime-Version: <Runtime enabled>

Steps to reproduce

1. open steam
2. view system informations

Technical details

• system: "x86_64-linux"
• host os: Linux 4.19.47, NixOS, 19.03.172783.a0b7a7913c4 (Koi)
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.2.2
• channels(davidak): ""
• channels(root): "nixos-19.03.172783.a0b7a7913c4, nixos-hardware, nixos-unstable-19.09pre181392.4ab1c14714f"
• nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos