diff --git a/modules/gc.nix b/modules/gc.nix
new file mode 100644
index 0000000..5358d5a
--- /dev/null
+++ b/modules/gc.nix
@@ -0,0 +1,7 @@
+{
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 30d";
+  };
+}
diff --git a/roles/all.nix b/roles/all.nix
index b772a68..621ed3b 100644
--- a/roles/all.nix
+++ b/roles/all.nix
@@ -21,6 +21,7 @@ in
     ../modules/borgbackup.nix
     ../modules/udisks2.nix
     ../modules/samba.nix
+    ../modules/gc.nix
 
     ../secrets/remote-builder.nix
     ../users/fleaz.nix
@@ -51,15 +52,10 @@ in
 
   console.font = consoleFont config.my.highDPI;
 
-  nix.gc = {
-    automatic = true;
-    dates = "weekly";
-    options = "--delete-older-than 30d";
-  };
-
   # weekly trim
   services.fstrim.enable = true;
 
+
   networking.extraHosts = ''
   '';
 }