major rewrite

modules/system/hardware/sound/pipewire/default.nix

@@ -0,0 +1,19 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  inherit (config.modules.system.hardware.sound) pipewire;
+  inherit (lib) mkIf;
+in {
+  config = mkIf pipewire.enable {
+    services.pipewire = {
+      enable = true;
+      audio.enable = true;
+
+      pulse.enable = true;
+      jack.enable = true;
+      alsa.enable = true;
+    };
+  };
+}

modules/system/nix/module.nix

@@ -7,6 +7,7 @@
   imports = [
     ./documentation.nix # nixos documentation
     ./nixpkgs.nix # global nixpkgs configuration.nix
+    ./registry.nix
   ];
 
   nix = {

modules/system/nix/registry.nix

@@ -0,0 +1,22 @@
+{
+  inputs,
+  pkgs,
+  ...
+}: let
+  inherit (inputs) nixpkgs;
+  nixpkgsPath = nixpkgs.outPath;
+in {
+  # Big thanks to Dianimo for this!
+  nix = {
+    registry = {
+      nixpkgs.flake = inputs.nixpkgs;
+      default.flake = inputs.nixpkgs;
+    };
+
+    nixPath = [
+      "nixpkgs=${nixpkgsPath}"
+      "n=${nixpkgsPath}"
+      "default=${nixpkgsPath}"
+    ];
+  };
+}