diff --git a/machines/heimdall/configuration.nix b/machines/heimdall/configuration.nix
index defb203..4212672 100644
--- a/machines/heimdall/configuration.nix
+++ b/machines/heimdall/configuration.nix
@@ -28,7 +28,6 @@
     keycloak.enable = true;
     nix-common = {
       enable = true;
-      gc-interval = "03:15";
     };
   };
 
diff --git a/machines/loki/configuration.nix b/machines/loki/configuration.nix
index 560e64b..04e6768 100644
--- a/machines/loki/configuration.nix
+++ b/machines/loki/configuration.nix
@@ -61,6 +61,7 @@
     nix-common = {
       enable = true;
       cross-systems = [ "aarch64-linux" ];
+      gc-interval = "weekly";
     };
     podman.enable = true;
     regreet = {
diff --git a/machines/mimir/configuration.nix b/machines/mimir/configuration.nix
index c54571d..d496d93 100644
--- a/machines/mimir/configuration.nix
+++ b/machines/mimir/configuration.nix
@@ -87,6 +87,7 @@
     nix-common = {
       enable = true;
       cross-systems = [ "aarch64-linux" ];
+      gc-interval = "weekly";
     };
     regreet = {
       enable = false;
diff --git a/modules/nix-common/default.nix b/modules/nix-common/default.nix
index d06b118..649c3b3 100644
--- a/modules/nix-common/default.nix
+++ b/modules/nix-common/default.nix
@@ -20,7 +20,7 @@ in
     gc-interval = mkOption {
       description = "How often to run nix-collect-garbage";
       type = types.str;
-      default = "weekly";
+      default = "03:15";
     };
   };