From 9dcf54d963d8d0a343ccceb73f32e057dc76d221 Mon Sep 17 00:00:00 2001
From: Stefan Ellmauthaler <stefan.ellmauthaler@tu-dresden.de>
Date: Wed, 17 Nov 2021 14:28:16 +0100
Subject: [PATCH] GC added automatic, persistent garbage collection

Signed-off-by: Stefan Ellmauthaler <stefan.ellmauthaler@tu-dresden.de>
---
 baseconfiguration.nix | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/baseconfiguration.nix b/baseconfiguration.nix
index f848887..06f1b1c 100644
--- a/baseconfiguration.nix
+++ b/baseconfiguration.nix
@@ -39,6 +39,17 @@
     extraOptions = ''
     experimental-features = nix-command flakes
     '';
+    gc = {
+      automatic = true;
+      persistent = true;
+      dates = "weekly";
+      options = "--delete-older-than 30d";
+    };
+    # Free up to 50GiB whenever there is less than 10GiB left.
+    extraOptions = ''
+      min-free = ${toString (10 * 1024 * 1024 * 1024)}
+      max-free = ${toString (50 * 1024 * 1024 * 1024)}
+    '';
   };
 
   nixpkgs = {