Fix restic daily backups

hosts/marauder/backup.nix

@@ -1,11 +1,5 @@
 { pkgs, config, secrets, ... }:
 {
-  environment.systemPackages = with pkgs; [
-    restic
-    libnotify
-    backblaze-b2
-  ];
-
   systemd.services = {
     notify-backup-b2-failed = {
       description = "Notify on failed backup to B2";
@@ -26,8 +20,8 @@
 
   environment.etc = {
     "restic-env".text = ''
-      export B2_ACCOUNT_ID="${secrets.b2.accountId}"
-      export B2_ACCOUNT_KEY="${secrets.b2.accountKey}"
+      B2_ACCOUNT_ID="${secrets.b2.accountId}"
+      B2_ACCOUNT_KEY="${secrets.b2.accountKey}"
     '';
     "restic-password".text = secrets.restic.password;
   };