init

system/nix/default.nix

@@ -0,0 +1,18 @@
+{ pkgs, ... }:
+{
+  imports = [
+    ./nixpkgs.nix
+    ./substituters.nix
+  ];
+
+  # for flakes
+  environment.systemPackages = [ pkgs.git ];
+
+  nix.settings = {
+    auto-optimise-store = true;
+    builders-use-substitutes = true;
+    experimental-features = ["nix-command" "flakes"];
+
+    trusted-users = ["root" "@wheel"];
+  };
+}

system/nix/nixpkgs.nix

@@ -0,0 +1,5 @@
+{
+  nixpkgs = {
+    config.allowUnfree = true;
+  };
+}

system/nix/substituters.nix

@@ -0,0 +1,11 @@
+{
+  nix.settings = {
+    substituters = [
+      "https://cache.nixos.org?priority=10"
+    ];
+
+    trusted-public-keys = [
+      "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
+    ];
+  };
+}