chore: init

modules/nixos/core/nix/default.nix

@@ -0,0 +1,50 @@
+{
+  flake,
+  config,
+  lib,
+  ...
+}:
+let
+  inherit (flake.config.people) user0;
+in
+{
+  nixpkgs = {
+    config = {
+      allowUnfree = true;
+      permittedInsecurePackages = [
+        "electron-unwrapped-33.0.2"
+        "electron-31.7.7"
+        "electron-27.3.11"
+        "electron-33.4.11"
+        "olm-3.2.16"
+      ];
+    };
+  };
+
+  nix = {
+    extraOptions = ''
+      experimental-features = nix-command flakes
+      keep-outputs = true
+      keep-derivations = true
+    '';
+    settings = {
+      substituters = [
+      ];
+      trusted-public-keys = [
+      ];
+      trusted-users = [
+        "root"
+        user0
+      ];
+    };
+  };
+  environment.etc."current-system-packages".text =
+    let
+      packages = builtins.map (p: "${p.name}") config.environment.systemPackages;
+
+      sortedUnique = builtins.sort builtins.lessThan (lib.unique packages);
+
+      formatted = builtins.concatStringsSep "\n" sortedUnique;
+    in
+    formatted;
+}