diff --git a/flake.nix b/flake.nix
index af27aac3c..b9e344277 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,10 +1,5 @@
 {
   description = "Prototype tooling for deploying PostgreSQL";
-  nixConfig = {
-    # Skip rebuilding all the packages, download instead.
-    # See nix/docs/binary-cache.nix to set it up.
-    extra-substituters = [ "https://nix-postgres-artifacts.s3.amazonaws.com" ];
-  };
   inputs = {
     devshell.url = "github:numtide/devshell";
     devshell.inputs.nixpkgs.follows = "nixpkgs";