diff --git a/flake.nix b/flake.nix
index bdc7faede..489fc625f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,4 +1,9 @@
 {
+  nixConfig = {
+    extra-substituters = "https://cache.privatevoid.net";
+    extra-trusted-public-keys = "cache.privatevoid.net:SErQ8bvNWANeAvtsOESUwVYr2VJynfuc9JRwlzTTkVg=";
+  };
+
   description = "The purely functional package manager - but super!";
 
   inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05-small";