diff --git a/backup.nix b/backup.nix
index 6b11ba9..d21cafd 100644
--- a/backup.nix
+++ b/backup.nix
@@ -1,7 +1,6 @@
 { lib, config, pkgs, utils, ... }:
 let
   cfg = config.backup-helper;
-  escaped-path = "/etc/machine-id";
   restic-wrapper = pkgs.writeShellApplication {
     name = "restic-wrapper";
     runtimeInputs = [
@@ -9,13 +8,13 @@ let
       pkgs.systemd
     ];
     text = ''
-      if [ "$#" -ne 1 ]; then
-        echo "Need exactly one argument, the path to backup.";
+      if [ -z "$BACKUP_HELPER_DIRS"  ]; then
+        echo "BACKUP_HELPER_DIRS is not set";
         exit 1;
       fi
-      path="$1";
-      echo "Starting backup of $path";
-      # restic backup ${escaped-path};
+      for i in ''${BACKUP_HELPER_DIRS//,/ }; do
+        echo "Starting backup of $i";
+      done
     '';
   };
 in
@@ -49,28 +48,26 @@ in
     };
   };
   config = lib.mkIf cfg.enable {
-    systemd.services."backup-helper@" = {
+    systemd.services."backup-helper" = {
       after = [ "network-online.target" ];
       environment = {
         RESTIC_REPOSITORY = cfg.restic-repository;
+        BACKUP_HELPER_DIRS = lib.strings.concatStringsSep "," cfg.backup-dirs;
       } // lib.attrsets.optionalAttrs (builtins.hasAttr "password-file" cfg) {
         RESTIC_PASSWORD_FILE = cfg.password-file;
       };
       serviceConfig = {
         Type = "oneshot";
-        ExecStart = "${restic-wrapper}/bin/restic-wrapper %f";
+        ExecStart = "${restic-wrapper}/bin/restic-wrapper";
       };
     };
-    systemd.timers."backup-helper@" = {
+    systemd.timers."backup-helper" = {
       timerConfig = {
         OnCalendar = cfg.schedule;
         Persistent = true;
         RandomizedDelaySec = cfg.randomized-delay;
       };
-    };
-    systemd.timers.${escaped-path} = {
       wantedBy = [ "timers.target" ];
-      overrideStrategy = "asDropin";
     };
   };
 }