diff --git a/flake.nix b/flake.nix
index 4545758..bd54d96 100644
--- a/flake.nix
+++ b/flake.nix
@@ -27,6 +27,7 @@
       ];
       pkgs = import nixpkgs {
         inherit system overlays;
+        config.contentAddressedByDefault = true;
       };
       rustPkgs = pkgs.rustBuilder.makePackageSet {
         packageFun = import ./Cargo.nix;