diff --git a/hosts/tanzanite/default.nix b/hosts/tanzanite/default.nix
index 2ef182e..2538838 100644
--- a/hosts/tanzanite/default.nix
+++ b/hosts/tanzanite/default.nix
@@ -102,6 +102,9 @@ in {
         };
       };
     };
+    postgresql = {
+      dataDir = "/opt/services/postgresql/${config.services.postgresql.package.psqlSchema}";
+    };
     prometheus = {
       enable = true;
       exporters = {