From f65c1dd5c3f05b39e9cf5e089a6bf43b200a8550 Mon Sep 17 00:00:00 2001
From: Simon Gardling <titaniumtown@proton.me>
Date: Sun, 22 Mar 2026 01:55:05 -0400
Subject: [PATCH] nix: enable weekly garbage collection of generations older
 than 30d

---
 system/common.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/system/common.nix b/system/common.nix
index 35b9194..fd48359 100644
--- a/system/common.nix
+++ b/system/common.nix
@@ -70,6 +70,13 @@
     # optimize the store
     optimise.automatic = true;
 
+    # auto garbage collect old generations
+    gc = {
+      automatic = true;
+      dates = "weekly";
+      options = "--delete-older-than 30d";
+    };
+
     # enable flakes!
     settings.experimental-features = [
       "nix-command"