diff --git a/dot_config/flake/flake.nix b/dot_config/flake/flake.nix
index 21e4d6b..43eb7b0 100644
--- a/dot_config/flake/flake.nix
+++ b/dot_config/flake/flake.nix
@@ -2,6 +2,7 @@
   description = "Home manager flake";
 
   inputs = {
+    # nixpkgs.follows = "nixos-cosmic/nixpkgs-stable";
     nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";
     nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
     lix-module = {
@@ -22,7 +23,6 @@
 
     cosmic = {
       url = "github:lilyinstarlight/nixos-cosmic";
-      # inputs.nixpkgs.follows = "nixpkgs";
     };
   };
 
diff --git a/dot_config/flake/machines/wash/configuration.nix b/dot_config/flake/machines/wash/configuration.nix
index 3b6b1ad..57737a3 100644
--- a/dot_config/flake/machines/wash/configuration.nix
+++ b/dot_config/flake/machines/wash/configuration.nix
@@ -47,6 +47,10 @@
   nix.optimise.automatic = true;
   nix.settings.experimental-features = ["nix-command" "flakes"];
   nix.settings.trusted-users = ["tyler" "@wheel"];
+  nix.settings = {
+    substituters = ["https://cosmic.cachix.org/"];
+    trusted-public-keys = ["cosmic.cachix.org-1:Dya9IyXD4xdBehWjrkPv6rtxpmMdRel02smYzA85dPE="];
+  };
 
   networking.hostName = "wash"; # Define your hostname.
   # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.