diff --git a/flake.nix b/flake.nix
index 59b2ffe..195fd6a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,6 +3,15 @@
 
   inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
   inputs.flake-utils.url = "github:numtide/flake-utils";
+   
+  nixConfig = {
+    extra-substituters = [
+      "https://cache.kyouma.net"
+    ];
+    extra-trusted-public-keys = [
+      "cache.kyouma.net:Frjwu4q1rnwE/MnSTmX9yx86GNA/z3p/oElGvucLiZg="
+    ];
+  };
 
   outputs = { self, nixpkgs, flake-utils }: {
     overlays.default = final: prev: rec {
@@ -134,6 +143,9 @@
         };
       }
     ;
+    hydraJobs = {
+      inherit (self) packages;
+    };
   } // flake-utils.lib.eachDefaultSystem (system: let
     pkgs = import nixpkgs {
       inherit system;