diff --git a/selfprivacy_api/jobs/nix_collect_garbage.py b/selfprivacy_api/jobs/nix_collect_garbage.py
index 6e21448..032dbe6 100644
--- a/selfprivacy_api/jobs/nix_collect_garbage.py
+++ b/selfprivacy_api/jobs/nix_collect_garbage.py
@@ -21,7 +21,12 @@ CLEAR_COMPLETED = "Garbage collection completed."
 
 def delete_old_gens_and_return_dead_report() -> str:
     subprocess.run(
-        ["nix-env", "-p", "/nix/var/nix/profiles/system", "--delete-generations old"],
+        [
+            "nix-env",
+            "-p", "/nix/var/nix/profiles/system",
+            "--delete-generations",
+            "old",
+        ],
         check=False,
     )