Counter Strike: Source won’t start on NixOS

After the latest update of my NixOS machine, Counter Strike: Source wont start. Starting Steam from console shows the following error message

src/] Attempt to free invalid pointer 0x94d1af0 
/home/user/.local/share/Steam/steamapps/common/Counter-Strike Source/ line 73: 14550 Aborted                 (core dumped) ${GAME_DEBUGGER} "${GAMEROOT}"/${GAMEEXE} "$@

I could fixed the problem by

  • copy the from Half-Life 2 bin-folder (/home/user/.local/share/Steam/steamapps/common/Half-Life 2/bin/ to Conter-Strike: Source bin-folder
  • Rename existing to or similar
  • rename to

The game now starts 🙂

Compile and use Proxmark3 on NixOS (nix-shell)

To compile and use proxmark3 on NixOS you need some packages. I created a nix-shell file with all needed dependencies.

Copy this file as shell.nix to the cloned proxmark3 folder and run sudo nix-shell. Continue then the normal compile guide.

with (import <nixpkgs> {});
mkShell {
  buildInputs = [


hw ver
lf search
lf em 410x clone --id 0011223344
lf em 410x reader

Useful information about NixOS

Since a few years i use NixOS as my favorite Linux distribution. NixOS is a Linux distribution based on the Nix package manager and build system. It supports reproducible and declarative system-wide configuration management as well as atomic upgrades and rollbacks, although it can additionally support imperative package and user management. See NixOS Wiki.

Upgrade to new version

  1. Review the NixOS release notes to ensure you account for any changes that need to be done manually. In particular, sometimes options change in backward-incompatible ways.

  2. sudo nix-channel --add nixos (Change version tag if necessary)

  3. sudo nix-channel --update

  4. nixos-rebuild --upgrade boot

  5. Reboot to enter your newly-built NixOS.

It‘s perfectly fine and recommended to leave system.stateVersion value in the configuration at the release version of the first install of this system. You should only bump this option, if you are sure that you can or have migrated all state on your system which is affected by this option. Before changing this value read the documentation for this option (e.g. man configuration.nix or on NixOS Options).


Clean up system

  1. sudo nix-collect-garbage --delete-older-than 30d


Upgrade Kernel to latest version

  1. Add boot.kernelPackages = pkgs.linuxPackages_latest; to your configuration.nix

Use pipewire for Audio (with Bluetooth)

sound.enable = false;
hardware.pulseaudio = {
  enable = false;
  package = pkgs.pulseaudioFull;
security.rtkit.enable = true;
services.pipewire = {
  enable = true;
  alsa.enable = true;
  alsa.support32Bit = true;
  pulse.enable = true;
  # If you want to use JACK applications, uncomment this
  #jack.enable = true;

  # use the example session manager (no others are packaged yet so this is enabled by default,
  # no need to redefine it in your config for now)
  #media-session.enable = true;
  config.pipewire = {
    "" = {
      #"link.max-buffers" = 64;
      "link.max-buffers" = 16; # version < 3 clients can't handle more than this
      "log.level" = 2; #
      #"default.clock.rate" = 48000;
      #"default.clock.quantum" = 1024;
      #"default.clock.min-quantum" = 32;
      #"default.clock.max-quantum" = 8192;
  media-session.config.bluez-monitor.rules = [
      # Matches all cards
      matches = [ { "" = "~bluez_card.*"; } ];
      actions = {
        "update-props" = {
          "bluez5.reconnect-profiles" = [ "hfp_hf" "hsp_hs" "a2dp_sink" ];
          # mSBC is not expected to work on all headset + adapter combinations.
          "bluez5.msbc-support" = true;
          # SBC-XQ is not expected to work on all headset + adapter combinations.
          "bluez5.sbc-xq-support" = true;
      matches = [
        # Matches all sources
        { "" = "~bluez_input.*"; }
        # Matches all outputs
        { "" = "~bluez_output.*"; }
      actions = {
        "node.pause-on-idle" = false;