diff --git a/hive.nix b/hive.nix
index c38c402..6e49eb7 100644
--- a/hive.nix
+++ b/hive.nix
@@ -20,6 +20,7 @@ let
 
       # Set NIX_PATH to the patched version of nixpkgs
       nix.nixPath = [ "nixpkgs=${mkNixpkgs node}" ];
+      nix.optimise.automatic = true;
 
       # Allow unfree packages
       nixpkgs.config.allowUnfree = true;