diff --git a/flake.nix b/flake.nix
index f6e805d..0b32008 100644
--- a/flake.nix
+++ b/flake.nix
@@ -24,6 +24,13 @@
         nix-with-tools = import (nix + "/docker.nix") {
           inherit pkgs;
           extraPkgs = [ pkgs.nodejs pkgs.skopeo ];
+          nixConf = {
+            extra-substituters = [ "https://nix-cache.tami.moe" ];
+            trusted-public-keys = [
+              "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
+              "nix-cache.tami.moe:3jrWZ412K0YTFfKMJC6ftc4lsugeMVWDBiudFCAdDb8="
+            ];
+          };
 
           Labels = {
             "org.opencontainers.image.title" = "Nix";