diff --git a/nixbld-etc-nixos/configuration.nix b/nixbld-etc-nixos/configuration.nix
index afac603..4c3781d 100644
--- a/nixbld-etc-nixos/configuration.nix
+++ b/nixbld-etc-nixos/configuration.nix
@@ -363,6 +363,9 @@ in
     mailerPasswordFile = "/etc/nixos/secret/mailerpassword";
     extraConfig =
     ''
+    [indexer]
+    REPO_INDEXER_ENABLED = true
+
     [mailer]
     ENABLED = true
     HOST = ssl.serverraum.org:587