diff --git a/default.nix b/default.nix
index 39d3355..17b85ef 100644
--- a/default.nix
+++ b/default.nix
@@ -37,6 +37,7 @@ in
       experimental-features = [
         "nix-command"
         "flakes"
+        "blake3-hashes"
       ];
       # trusted-users = [ "administration" ];
       auto-optimise-store = true;