From cd613ef38f432b41bea4a05860da3faab8fac49a Mon Sep 17 00:00:00 2001
From: Timothy DeHerrera <tim@nrdxp.dev>
Date: Fri, 21 Nov 2025 14:21:10 -0700
Subject: [PATCH] fix: don't copy nixpkgs to the store needlessly

if the value of nixpkgs is a path, it will be copied to the store by
nix's implicit interpolation. Coercing it to a string beforehand should
resolve this.
---
 nixos-modules/host/options.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nixos-modules/host/options.nix b/nixos-modules/host/options.nix
index 5ac9d2ab..a987eb63 100644
--- a/nixos-modules/host/options.nix
+++ b/nixos-modules/host/options.nix
@@ -38,7 +38,7 @@
             default = null;
             type = nullOr (lib.mkOptionType {
               name = "Toplevel NixOS config";
-              merge = loc: defs: (import "${config.nixpkgs}/nixos/lib/eval-config.nix" {
+              merge = loc: defs: (import "${toString config.nixpkgs}/nixos/lib/eval-config.nix" {
                 modules =
                   let
                     extraConfig = ({ lib, ... }: {