module moving mostly done

modules/nix.nix

@@ -0,0 +1,53 @@
+{
+  nix,
+  unstable,
+  ...
+}: {
+  inputs,
+  lib,
+  self,
+  settings,
+  ...
+}: {
+  nix = {
+    #   package = nix.packages.${pkgs.system}.nix;
+    #automatically get registry from input flakes
+    registry =
+      (
+        lib.attrsets.mapAttrs (
+          _: value: {
+            flake = value;
+          }
+        ) (
+          lib.attrsets.filterAttrs (
+            _: value: (
+              !(lib.attrsets.hasAttrByPath ["flake"] value) || value.flake == false
+            )
+          )
+          inputs
+        )
+        // {
+          nixpkgs.flake = unstable;
+          system.flake = self;
+        }
+      )
+      // {system = {flake = self;};};
+    #automatically add registry entries to nixPath
+    nixPath = (lib.mapAttrsToList (name: value: name + "=" + value) inputs) ++ ["system=${self}" "nixpkgs=${unstable}"];
+    settings = {
+      experimental-features = ["nix-command" "flakes" "repl-flake"];
+      auto-optimise-store = true;
+      warn-dirty = false;
+      flake-registry = builtins.toFile "empty-flake-registry.json" ''{"flakes":[],"version":2}'';
+      keep-outputs = true;
+      keep-derivations = true;
+      trusted-users = [
+        "root"
+        "@wheel"
+      ];
+      allowed-users = [
+      ];
+    };
+  };
+  environment.etc."booted-system".source = self;
+}