muhammed: Enable nightly Nix GC

The Nix store was growing quite large. It was consuming a lot of disk
space with some really old stuff.

In the future, I might need to tweak it a bit more; it seems a bit too
aggressive right now. Even recently used projects require rebuilding.

1 files changed, 6 insertions, 0 deletions

diff --git a/hosts/muhammed/configuration.nix b/hosts/muhammed/configuration.nix
index 96564fb..f3908b2 100644
--- a/hosts/muhammed/configuration.nix
+++ b/hosts/muhammed/configuration.nix
@@ -64,6 +64,12 @@
     };
   };
 
+  # Enable nightly GC of Nix store.
+  nix.gc = {
+    automatic = true;
+    interval = {Hour = 3;};
+  };
+
   # System-specific version info.
   home-manager.users.linus.home.stateVersion = "22.05";
   system.stateVersion = 4;