diff --git a/inventories/default.nix b/inventories/default.nix
index dded88a..b22cad2 100644
--- a/inventories/default.nix
+++ b/inventories/default.nix
@@ -384,7 +384,7 @@
                           name = "matrix";
                           webhook_configs = [
                             {
-                              url_file = config.clan.core.vars.generator.prometheus.files.matrix-alertmanager-urlfile.path;
+                              url_file = config.clan.core.vars.generators.prometheus.files.matrix-alertmanager-urlfile.path;
                               send_resolved = true;
                             }
                           ];
diff --git a/machines/rigel/configuration.nix b/machines/rigel/configuration.nix
index ba716a7..4ed3b2c 100644
--- a/machines/rigel/configuration.nix
+++ b/machines/rigel/configuration.nix
@@ -9,7 +9,11 @@
     files.envFile.secret = true;
     files.matrix-alertmanager-token.secret = true;
     files.matrix-alertmanager-secret.secret = true;
-    files.matrix-alertmanager-urlfile.secret = true;
+    files.matrix-alertmanager-urlfile = {
+      secret = true;
+      owner = "alertmanager";
+      group = "alertmanager";
+    };
     script = ''
       echo "" > $out/envFile
       echo "" > $out/matrix-alertmanager-token