From f9205e1e963aa2ff9e31f93e80c536aa59f0842e Mon Sep 17 00:00:00 2001
From: Franck Cuny <franck@fcuny.net>
Date: Thu, 9 Oct 2025 19:11:52 -0700
Subject: move common modules under modules/

Simplify the import on the various hosts.
---
 modules/darwin/nix.nix | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 modules/darwin/nix.nix

(limited to 'modules/darwin/nix.nix')

diff --git a/modules/darwin/nix.nix b/modules/darwin/nix.nix
new file mode 100644
index 0000000..56d85ca
--- /dev/null
+++ b/modules/darwin/nix.nix
@@ -0,0 +1,42 @@
+{
+  lib,
+  adminUser,
+  pkgs,
+  ...
+}:
+{
+  nix = {
+    extraOptions = ''
+      tarball-ttl = 900
+    '';
+    gc = {
+      automatic = true;
+      options = "--delete-older-than 7d";
+    };
+    optimise = {
+      automatic = true;
+    };
+    package = pkgs.nixVersions.stable;
+    settings = {
+      trusted-substituters = [
+        "https://cachix.cachix.org"
+        "https://nixpkgs.cachix.org"
+        "https://nix-community.cachix.org"
+      ];
+      trusted-public-keys = [
+        "cachix.cachix.org-1:eWNHQldwUO7G2VkjpnjDbWwy4KQ/HNxht7H4SSoMckM="
+        "nixpkgs.cachix.org-1:q91R6hxbwFvDqTSDKwDAV4T5PxqXGxswD8vhONFMeOE="
+        "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
+        "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+      ];
+      trusted-users = [
+        "@admin"
+        adminUser.name
+      ];
+      experimental-features = lib.mkDefault [
+        "nix-command"
+        "flakes"
+      ];
+    };
+  };
+}
-- 
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