nixos/nix: init, based on nixos/meta and nixos/dev/cross-compiling

hosts/miku-nixos/default.nix

@@ -18,6 +18,7 @@ in
     desktop.audio.lowLatency.enable = true;
     dev.enable = true;
     games.enable = true;
+    nix.cross-compiling.enable = true;
     server = {
       plex.enable = true;
       rtorrent.enable = true;

hosts/sankyuu-nixos/default.nix

@@ -47,6 +47,7 @@ in
 
   nixos = {
     dev.enable = true;
+    nix.cross-compiling.enable = true;
     desktop = {
       audio.lowLatency = {
         enable = true;

nixos/dev/default.nix

@@ -4,7 +4,6 @@ let
 in
 {
   imports = [
-    ./cross-compiling.nix
     ./virtualisation.nix
   ];
 

nixos/minimal.nix

@@ -2,8 +2,8 @@
 
 {
   imports = [
-    ./meta.nix
-    ./system
     ../modules
+    ./nix
+    ./system
   ];
 }

nixos/dev/cross-compiling.nix → nixos/nix/cross-compiling.nix

@@ -1,19 +1,18 @@
 { config, lib, ... }:
 
 let
-  cfg = config.nixos.dev.cross-compiling;
+  cfg = config.nixos.nix.cross-compiling;
 in
 {
-  options.nixos.dev.cross-compiling = {
-    enable = lib.mkEnableOption "cross-compiling config for nixpkgs" // {
-      default = config.nixos.dev.enable;
-    };
+  options.nixos.nix.cross-compiling = {
+    enable = lib.mkEnableOption "cross-compiling config for nixpkgs";
     emulatedSystems = lib.mkOption {
       description = "List of systems to emulate via QEMU";
       type = lib.types.listOf lib.types.str;
       default = [ "aarch64-linux" ];
     };
   };
+
   config = lib.mkIf cfg.enable {
     # Allow compilation of packages ARM/ARM64 architectures via QEMU
     # e.g. nix-build -A <pkg> --argstr system aarch64-linux

nixos/nix/default.nix

@@ -0,0 +1,35 @@
+{ config, lib, pkgs, flake, ... }:
+
+{
+  imports = [
+    ../../cachix.nix
+    ../../overlays
+    ./cross-compiling.nix
+  ];
+
+  options.nixos.nix.enable = lib.mkDefaultOption "nix/nixpkgs config";
+
+  config = lib.mkIf config.nixos.nix.enable {
+    # Add some Nix related packages
+    environment.systemPackages = with pkgs; [
+      nixos-cleanup
+      nom-rebuild
+    ];
+
+    nix = import ../../shared/nix.nix { inherit pkgs flake; };
+
+    # Enable unfree packages
+    nixpkgs.config.allowUnfree = true;
+
+    # Change build dir to /var/tmp
+    systemd.services.nix-daemon = {
+      environment.TMPDIR = lib.mkDefault "/var/tmp";
+    };
+
+    # This value determines the NixOS release with which your system is to be
+    # compatible, in order to avoid breaking some software such as database
+    # servers. You should change this only after NixOS release notes say you
+    # should.
+    system.stateVersion = lib.mkDefault "23.11"; # Did you read the comment?
+  };
+}