feat: use garnix

flake.nix

@@ -1,17 +1,29 @@
 {
-  description = "WinApps Nix packages & NixOS module";
+  description = "WinApps Nix packages";
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
 
     flake-compat.url = "https://flakehub.com/f/edolstra/flake-compat/1.tar.gz";
     flake-utils.url = "github:numtide/flake-utils";
+    nix-filter.url = "github:numtide/nix-filter";
+  };
+
+  nixConfig = {
+    extra-substituters = [
+      "https://cache.garnix.io"
+    ];
+
+    extra-trusted-public-keys = [
+      "cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g="
+    ];
   };
 
   outputs =
     {
       nixpkgs,
       flake-utils,
+      nix-filter,
       ...
     }:
     flake-utils.lib.eachDefaultSystem (
@@ -22,7 +34,7 @@
       {
         formatter = pkgs.nixfmt-rfc-style;
 
-        packages.winapps = pkgs.callPackage ./packages/winapps { };
+        packages.winapps = pkgs.callPackage ./packages/winapps { inherit nix-filter; };
         packages.winapps-launcher = pkgs.callPackage ./packages/winapps-launcher { };
       }
     );