diff --git a/ops/machines/gerrit01/default.nix b/ops/machines/gerrit01/default.nix
index e964e6631..ab53c6fc8 100644
--- a/ops/machines/gerrit01/default.nix
+++ b/ops/machines/gerrit01/default.nix
@@ -47,15 +47,7 @@ in
       KbdInteractiveAuthentication = false;
     };
   };
-
-  # Automatically collect garbage from the Nix store.
-  services.depot.automatic-gc = {
-    enable = true;
-    interval = "daily";
-    diskThreshold = 5; # GiB
-    maxFreed = 3; # GiB
-    preserveGenerations = "30d";
-  };
+  nix.gc.automatic = true;
 
   age.secrets =
     let
diff --git a/ops/machines/meta01/default.nix b/ops/machines/meta01/default.nix
index d0810ecd3..ae9eb0123 100644
--- a/ops/machines/meta01/default.nix
+++ b/ops/machines/meta01/default.nix
@@ -48,15 +48,7 @@ in
       KbdInteractiveAuthentication = false;
     };
   };
-
-  # Automatically collect garbage from the Nix store.
-  services.depot.automatic-gc = {
-    enable = true;
-    interval = "daily";
-    diskThreshold = 5; # GiB
-    maxFreed = 3; # GiB
-    preserveGenerations = "30d";
-  };
+  nix.gc.automatic = true;
 
   services.depot = {
     # TODO: make it possible to do `alertmanager.enable = true;`
diff --git a/ops/machines/public01/default.nix b/ops/machines/public01/default.nix
index d93407a36..5a738b4a7 100644
--- a/ops/machines/public01/default.nix
+++ b/ops/machines/public01/default.nix
@@ -49,16 +49,9 @@ in
       KbdInteractiveAuthentication = false;
     };
   };
+  nix.gc.automatic = true;
 
   services.depot = {
-    # Automatically collect garbage from the Nix store.
-    automatic-gc = {
-      enable = true;
-      interval = "daily";
-      diskThreshold = 5; # GiB
-      maxFreed = 3; # GiB
-      preserveGenerations = "30d";
-    };
     forgejo = {
       enable = true;
       domain = "git.snix.dev";