From d84f0810be65ef297662a90cc6466a89e79f7b39 Mon Sep 17 00:00:00 2001
From: Malix - Alix Brunet <alixbrunetcontact@gmail.com>
Date: Fri, 9 Jan 2026 19:19:32 +0100
Subject: [PATCH] enhancement: remove impure `<nixpkgs>`

Co-Authored-By: Jamie Magee <jamie.magee@gmail.com>
Co-Authored-By: Doron Behar <doron.behar@gmail.com>
---
 flake.lock                         | 19 ++++++++++++++++++-
 flake.nix                          | 21 ++++++++++-----------
 mnt/reform/updateKernelPatches.nix | 10 ++++++----
 mnt/reform/updateKernelPatches.sh  |  2 +-
 4 files changed, 35 insertions(+), 17 deletions(-)

diff --git a/flake.lock b/flake.lock
index 5999137c..67a1708d 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,6 +1,23 @@
 {
   "nodes": {
-    "root": {}
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1767892417,
+        "narHash": "sha256-8bW3q88CEg2u4hSP66Vf4lpbLonHz7hqDNBMcCY7E9U=",
+        "rev": "3497aa5c9457a9d88d71fa93a4a8368816fbeeba",
+        "type": "tarball",
+        "url": "https://releases.nixos.org/nixos/unstable/nixos-26.05pre924538.3497aa5c9457/nixexprs.tar.xz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://channels.nixos.org/nixos-unstable/nixexprs.tar.xz"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
   },
   "root": "root",
   "version": 7
diff --git a/flake.nix b/flake.nix
index 060b14de..8054e8d3 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,13 +1,17 @@
 {
   description = "nixos-hardware";
 
+  inputs.nixpkgs.url = "https://channels.nixos.org/nixos-unstable/nixexprs.tar.xz";
+
   outputs =
-    { self, ... }:
+    { self, nixpkgs, ... }:
     let
       # Import private inputs (for development)
       privateInputs =
         (import ./tests/flake-compat.nix {
-          src = ./tests;
+          src = {
+            outPath = self.outPath + "/tests";
+          };
         }).defaultNix;
 
       systems = [
@@ -23,17 +27,10 @@
       ];
 
       # Helper to iterate over systems
-      eachSystem =
-        f:
-        privateInputs.nixos-unstable-small.lib.genAttrs systems (
-          system: f privateInputs.nixos-unstable-small.legacyPackages.${system} system
-        );
+      eachSystem = f: nixpkgs.lib.genAttrs systems (system: f nixpkgs.legacyPackages.${system} system);
 
       eachSystemFormat =
-        f:
-        privateInputs.nixos-unstable-small.lib.genAttrs formatSystems (
-          system: f privateInputs.nixos-unstable-small.legacyPackages.${system} system
-        );
+        f: nixpkgs.lib.genAttrs formatSystems (system: f nixpkgs.legacyPackages.${system} system);
     in
     {
 
@@ -494,6 +491,8 @@
           run-tests = pkgs.callPackage ./tests/run-tests.nix {
             inherit self;
           };
+
+          mnt-reform-kernel-patches = pkgs.callPackage ./mnt/reform/updateKernelPatches.nix { };
         }
         // pkgs.lib.optionalAttrs (system == "aarch64-linux") {
           # Boot images for NXP i.MX boards (aarch64-linux only)
diff --git a/mnt/reform/updateKernelPatches.nix b/mnt/reform/updateKernelPatches.nix
index 59d3e4ca..e30bd6f9 100644
--- a/mnt/reform/updateKernelPatches.nix
+++ b/mnt/reform/updateKernelPatches.nix
@@ -1,9 +1,11 @@
+{
+  lib,
+  fetchFromGitLab,
+}:
+
 let
-  nixpkgs = import <nixpkgs> { };
-  pkgs = nixpkgs.pkgs;
-  lib = nixpkgs.lib;
   sources = lib.importJSON ./sources.json;
-  reformDebianPackages = pkgs.fetchFromGitLab sources.reformDebianPackages;
+  reformDebianPackages = fetchFromGitLab sources.reformDebianPackages;
 in
 map (lib.removePrefix "${reformDebianPackages}/") (
   lib.filesystem.listFilesRecursive "${reformDebianPackages}/linux/patches${lib.versions.majorMinor sources.modDirVersion}"
diff --git a/mnt/reform/updateKernelPatches.sh b/mnt/reform/updateKernelPatches.sh
index 032fc3af..79581c7d 100755
--- a/mnt/reform/updateKernelPatches.sh
+++ b/mnt/reform/updateKernelPatches.sh
@@ -1,4 +1,4 @@
 #!/usr/bin/env sh
 
-nix eval --file updateKernelPatches.nix > kernelPatches.nix
+nix eval .#mnt-reform-kernel-patches > kernelPatches.nix
 nix fmt kernelPatches.nix