From f2bd4e9e52765d555693d8ad6538ae3e511854df Mon Sep 17 00:00:00 2001
From: rope <fredrik@nordhammer.it>
Date: Wed, 3 Jun 2026 17:17:00 +0100
Subject: [PATCH] nix: enable auto-optimise-store

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
---
 common.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/common.nix b/common.nix
index d7a5dbe..310fa5b 100644
--- a/common.nix
+++ b/common.nix
@@ -116,6 +116,10 @@
       busybox
   ];
 
+  # Hard-link identical files in the store as new paths are added, so the
+  # store de-duplicates itself on every build instead of drifting.
+  nix.settings.auto-optimise-store = true;
+
   # Offload builds to the media server. Excluded on the server itself to
   # avoid a pointless SSH round-trip to localhost.
   nix.distributedBuilds =