diff --git a/nixos/flake.nix b/nixos/flake.nix
index 5d8c1fb7..04af0e18 100644
--- a/nixos/flake.nix
+++ b/nixos/flake.nix
@@ -60,8 +60,7 @@
     };
 
     nix = {
-      url = github:IvanMalison/nix;
-      inputs.nixpkgs.follows = "nixpkgs";
+      url = github:IvanMalison/nix/my2.15.1;
     };
 
     flake-utils = {
diff --git a/nixos/nix.nix b/nixos/nix.nix
index 04ad524e..2afdc9bf 100644
--- a/nixos/nix.nix
+++ b/nixos/nix.nix
@@ -5,6 +5,10 @@
       experimental-features = nix-command flakes
     '';
     registry.nixpkgs.flake = inputs.nixpkgs;
+    settings = {
+      keep-outputs = true;
+      keep-derivations = true;
+    };
   };
 
   nixpkgs.overlays = with inputs; [