diff --git a/nixos/machines/hera/configuration.nix b/nixos/machines/hera/configuration.nix
index 1771e85a..6ef900bd 100644
--- a/nixos/machines/hera/configuration.nix
+++ b/nixos/machines/hera/configuration.nix
@@ -30,8 +30,8 @@ in {
     ../../roles/firefox-sync.nix
     ../../roles/goatcounter.nix
     (../../roles/monitoring/folder-size-exporter.nix {
-       folders = ["/nix", "/root"];
-       subfolders = ["/var/log", "/var/lib", "/media", "/home"];
+      folders = ["/nix" "/root"];
+      subfolders = ["/var/log" "/var/lib" "/media" "/home"];
     })
     ./web.nix
     ./mail.nix