diff --git a/flake.nix b/flake.nix
index e3314b8..504e7e0 100644
--- a/flake.nix
+++ b/flake.nix
@@ -358,5 +358,7 @@
 
   nixConfig = {
     allow-import-from-derivation = true;
+    extra-trusted-public-keys = "nixbld.m-labs.hk-1:5aSRVA5b320xbNvu30tqxVPXpld73bhtOeH6uAjRyHc=";
+    extra-substituters = "https://nixbld.m-labs.hk";
   };
 }