diff --git a/commit_text b/commit_text
index f6fe88a..6586cdd 100644
--- a/commit_text
+++ b/commit_text
@@ -1 +1 @@
-Removed nh
+Added nix automatic gc
diff --git a/configuration.nix b/configuration.nix
index 9237210..e426cf3 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -120,6 +120,11 @@ in
     "flakes"
   ];
   nix.settings.auto-optimise-store = true;
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 7d";
+  };
 
   # Bootloader.
   boot.loader.systemd-boot.enable = false;