diff --git a/build01/hydra.nix b/build01/hydra.nix
index f5ba53b..6e59176 100644
--- a/build01/hydra.nix
+++ b/build01/hydra.nix
@@ -105,6 +105,14 @@ in {
       '';
     };
 
+    services.postgresql = {
+      enable = true;
+      extraConfig = ''
+        shared_buffers = 4GB
+        effective_cache_size = 4GB
+      '';
+    };
+
     nix = {
       distributedBuilds = true;
       extraOptions = ''