diff --git a/configuration.nix b/configuration.nix
index dfeabca..44cf5fc 100755
--- a/configuration.nix
+++ b/configuration.nix
@@ -56,6 +56,9 @@ in
     ];
     build-dir = "/nix/var/nix/builds";
     auto-optimise-store = true;
+    substituters = ["https://hyprland.cachix.org"];
+    trusted-substituters = ["https://hyprland.cachix.org"];
+    trusted-public-keys = ["hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc="];
   };
 
   # ─── Users ──────────────────────────────────────────────────────────────────
@@ -118,6 +121,7 @@ in
   environment = {
     sessionVariables = {
       ZDOTDIR = "$HOME/.config/zsh";
+      TZ = ":/etc/localtime";
     };
     pathsToLink = [ "/share/zsh" ];
     variables = {
diff --git a/flake.lock b/flake.lock
index c6236ca..53a53dd 100644
--- a/flake.lock
+++ b/flake.lock
@@ -499,18 +499,16 @@
       },
       "locked": {
         "lastModified": 1769011011,
-        "narHash": "sha256-aAayoXHwRLeUb6/Inu3t/gW+F0hY9Cvi0ab3PgzxBdQ=",
-        "ref": "refs/heads/main",
+        "narHash": "sha256-lIF9wyXxf5QTv2D0HbI5n+l780S+WK6xxFgFZmoC7/M=",
+        "owner": "hyprwm",
+        "repo": "Hyprland",
         "rev": "22fc8136a21676472b232f9462318e16b1d16745",
-        "revCount": 6830,
-        "submodules": true,
-        "type": "git",
-        "url": "https://github.com/hyprwm/Hyprland"
+        "type": "github"
       },
       "original": {
-        "submodules": true,
-        "type": "git",
-        "url": "https://github.com/hyprwm/Hyprland"
+        "owner": "hyprwm",
+        "repo": "Hyprland",
+        "type": "github"
       }
     },
     "hyprland-guiutils": {
diff --git a/flake.nix b/flake.nix
index 1c994d7..a8cdcfb 100755
--- a/flake.nix
+++ b/flake.nix
@@ -49,7 +49,6 @@
     };
     hyprland = {
       url = "github:hyprwm/Hyprland";
-      inputs.nixpkgs.follows = "nixpkgs";
     };
     hyprland-plugins = {
       url = "github:hyprwm/hyprland-plugins";
diff --git a/system/nixOSPkgs.nix b/system/nixOSPkgs.nix
index 1615690..7d44dd3 100755
--- a/system/nixOSPkgs.nix
+++ b/system/nixOSPkgs.nix
@@ -183,6 +183,7 @@ in
     nil
     nixfmt
     inputs.nix-alien.packages.${pkgs.stdenv.hostPlatform.system}.nix-alien
+    cachix
 
     # --- Wayland / Desktop ---
     foot