initial commit

modules/nixos/common/nix.nix

@@ -0,0 +1,19 @@
+{
+  config,
+  lib,
+  ...
+}:
+
+let
+  inherit (lib) mkDefault;
+in
+{
+  nix = {
+    # use flakes
+    channel.enable = mkDefault false;
+
+    # De-duplicate store paths using hardlinks except in containers
+    # where the store is host-managed.
+    optimise.automatic = mkDefault (!config.boot.isContainer);
+  };
+}