diff --git a/common/nix.nix b/common/nix.nix
index 912c34c..9545cb8 100644
--- a/common/nix.nix
+++ b/common/nix.nix
@@ -1,15 +1,20 @@
-{...}: {
-  nix.settings = {
-    trusted-substituters = [
-      "https://nix-community.cachix.org/"
-    ];
-    trusted-public-keys = [
-      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
-    ];
-    auto-optimise-store = true;
-    experimental-features = ["nix-command" "flakes" "auto-allocate-uids" "cgroups" "ca-derivations"];
-    auto-allocate-uids = true;
-    use-cgroups = true;
+{nixpkgs, ...}: {
+  environment.etc."nix/inputs/nixpkgs".source = nixpkgs.outPath;
+  nix = {
+    nixPath = ["nixpkgs=/etc/nix/inputs/nixpkgs"];
+    registry.nixpkgs.flake = nixpkgs;
+    settings = {
+      trusted-substituters = [
+        "https://nix-community.cachix.org/"
+      ];
+      trusted-public-keys = [
+        "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+      ];
+      auto-optimise-store = true;
+      experimental-features = ["nix-command" "flakes" "auto-allocate-uids" "cgroups" "ca-derivations"];
+      auto-allocate-uids = true;
+      use-cgroups = true;
+    };
   };
   nixpkgs.config.allowUnfree = true;
 }