From ecc37b8fc306c3fcb24715ff36b025efe8e1d4e1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jalil=20David=20Salam=C3=A9=20Messina?=
 <jalil.salame@gmail.com>
Date: Mon, 21 Apr 2025 21:01:41 +0200
Subject: [PATCH] refactor(example-vm): don't import nixpkgs

This should save on evaluation time.
---
 example-vm/vm-config.nix     |  2 ++
 flake-modules/example-vm.nix | 17 ++++++++---------
 2 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/example-vm/vm-config.nix b/example-vm/vm-config.nix
index 1b2b4d0..67e38a7 100644
--- a/example-vm/vm-config.nix
+++ b/example-vm/vm-config.nix
@@ -31,4 +31,6 @@
   # Before changing this value read the documentation for this option
   # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
   system.stateVersion = "24.11"; # Did you read the comment?
+
+  nixpkgs.hostPlatform = "x86_64-linux";
 }
diff --git a/flake-modules/example-vm.nix b/flake-modules/example-vm.nix
index b21085d..e941b37 100644
--- a/flake-modules/example-vm.nix
+++ b/flake-modules/example-vm.nix
@@ -1,19 +1,18 @@
 { inputs, lib, ... }:
-let
-  system = "x86_64-linux";
-  overlays = builtins.attrValues inputs.self.overlays;
-  config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [ "steam-unwrapped" ];
-  pkgs = import inputs.nixpkgs { inherit system overlays config; };
-in
 {
   # Example vm configuration
   flake.nixosConfigurations.vm = lib.nixosSystem {
-    inherit pkgs;
     modules = [
       inputs.self.nixosModules.default
       ../example-vm # import vm configuration
-      { nix.registry.nixpkgs.flake = inputs.nixpkgs; } # pin nixpkgs to the one used by the system
+      {
+        nixpkgs = {
+          overlays = builtins.attrValues inputs.self.overlays;
+          config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [ "steam-unwrapped" ];
+        };
+        # pin nixpkgs to the one used by the system
+        nix.registry.nixpkgs.flake = inputs.nixpkgs;
+      }
     ];
   };
-
 }